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  • id
    id
    noun
    the part of the psyche, residing in the unconscious, that is the source of instinctive impulses that seek satisfaction in accordance with the pleasure principle and are modified by the ego and the superego before they are given overt expression.
  • ID
    ID
    noun
    a means of identification, as a card or bracelet containing official or approved identification information.
  • I'd
    I'd
    contraction of I had:
  • -id
    -id
    a suffix of nouns that have the general sense “offspring of, descendant of,” occurring originally in loanwords from Greek (Atreid; Nereid ), and productive in English on the Greek model, especially in names of dynasties, with the dynasty's founder as the base noun (Abbasid; Attalid ), and in names of periodic meteor showers, with the base noun usually denoting the constellation or other celestial object in which the shower appears (Perseid ).
  • id.
    id.
    abbreviation
    idem.
  • Id.
    Id.
    abbreviation
    Idaho.
  • ID.
    ID.
    abbreviation
    (in Iraq ) dinar; dinars.
  • I.D.
    I.D.
    abbreviation
    identification.
Synonyms

id

1 American  
[id] / ɪd /

noun

Psychoanalysis.
  • ids
    plural
  1. the part of the psyche, residing in the unconscious, that is the source of instinctive impulses that seek satisfaction in accordance with the pleasure principle and are modified by the ego and the superego before they are given overt expression.


ID 2 American  
[ahy-dee] / ˈaɪˈdi /

noun

  1. a means of identification, as a card or bracelet containing official or approved identification information.


verb (used with object)

ID'd, IDed, ID'ed, ID'ing, IDing
  1. to identify.

  2. to issue an ID to.

    Go to the admissions office if you haven't been ID'd yet.

ID 3 American  

abbreviation

  1. Idaho (approved especially for use with zip code).

  2. infectious disease.

  3. inner diameter, internal diameter, or inside diameter. Also i.d.

  4. intellectual disability.

  5. intelligent design.


I'd 4 American  
[ahyd] / aɪd /
  1. contraction of I had:

    I'd never seen anything like it before!

  2. contraction of I would:

    If I were you, I'd be careful what I wish for.


-id 5 American  
  1. a suffix of nouns that have the general sense “offspring of, descendant of,” occurring originally in loanwords from Greek (Atreid; Nereid ), and productive in English on the Greek model, especially in names of dynasties, with the dynasty's founder as the base noun (Abbasid; Attalid ), and in names of periodic meteor showers, with the base noun usually denoting the constellation or other celestial object in which the shower appears (Perseid ).


-id 6 American  
  1. a suffix occurring in English derivatives of modern Latin taxonomic names, especially zoological families and classes; such derivatives are usually nouns denoting a single member of the taxon or adjectives with the sense “pertaining to” the taxon: arachnid; canid .


-id 7 American  
  1. variant of -ide: lipid .


-id 8 American  
  1. a suffix occurring in descriptive adjectives borrowed from Latin, often corresponding to nouns ending in -or1 : fetid; humid; pallid .


id. 9 American  

abbreviation

  1. idem.


Id. 10 American  

abbreviation

  1. Idaho.


ID. 11 American  

abbreviation

  1. (in Iraq ) dinar; dinars.


I.D. 12 American  

abbreviation

  1. identification.

  2. identity.

  3. Military. Infantry Division.

  4. Intelligence Department.


-id 1 British  

suffix

  1. a variant of -ide

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

-id 2 British  

suffix

  1. indicating members of a zoological family

    cyprinid

  2. indicating members of a dynasty

    Seleucid

    Fatimid

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

-id 3 British  

suffix

  1. indicating the names of meteor showers that appear to radiate from a specified constellation

    Orionids (from Orion)

  2. indicating a particle, body, or structure of a specified kind

    energid

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

ID 4 British  

abbreviation

  1. Idaho

  2. identification (document)

  3. Also: i.d. inside diameter

  4. Intelligence Department

  5. Also: i.d. intradermal

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

id. 5 British  

abbreviation

  1. idem

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Id. 6 British  

abbreviation

  1. Idaho

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

id 7 British  

abbreviation

  1. Indonesia

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

id 8 British  
/ ɪd /

noun

  1. psychoanal the mass of primitive instincts and energies in the unconscious mind that, modified by the ego and the superego, underlies all psychic activity

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

I'd 9 British  
/ aɪd /

contraction

  1. I had or I would

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

id Cultural  
  1. In Freudian theory, the part of the psyche associated with instinctual, repressed, or antisocial desires, usually sexual or aggressive. In its efforts to satisfy these desires, the id comes into conflict with the social and practical constraints enforced by the ego and superego. (See also pleasure principle.)


Usage

See contraction.

Other Word Forms

Noun Inflected Forms


Etymology

Origin of id1

1920–25; < Latin id it, as a translation of German Es, special use of es it, as a psychoanalytic term

Origin of ID2

First recorded in 1935–40

Origin of I'd4

First recorded in 1590–1600

Origin of -id5

< Latin -id-, stem of -is < Greek: feminine patronymic suffix; or < Latin -idēs < Greek: masculine patronymic suffix

Origin of -id6

< Greek -idēs -id 1, as singular of New Latin -ida -ida or -idae -idae

Origin of -id8

From the Latin suffix -idus

Origin of I.D.12

First recorded in 1950–55


Explanation

Use the word id when you talk about the most basic, impulsive part of a person's mind. A baby's instincts for food and comfort, for example, are controlled by her id. In psychology, particularly in psychoanalysis, the mind is divided into three basic parts. The most instinctive of these is the id, the drives for pleasure, food, sex, and aggression. The id is the most chaotic and least organized part of the mind, controlled in a healthy person by the ego and superego. The word id is a Latin translation of the "Es" in Sigmund Freud's "Das Ich und das Es." Both Es and id mean "it."

Keep Reading on Vocabulary.com

Vocabulary lists containing id

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

I don’t remember when apple picking turned into such an unleashed expression of autumnal id.

From The Wall Street Journal ● Oct. 21, 2026

I’m not a rule-follower much, but I cannot imagine a world in which id tell an owner—nah—I’m doing it my way.

From The Wall Street Journal ● Oct. 5, 2026

Jonas adds, “It’s allegorical in nature. What if I could just take this man and chain him up? It’s making that literal for us to watch. It’s about that female id deep inside of us.”

From Los Angeles Times ● Feb. 26, 2026

You can also get your fossil identified by sending pictures to the British Geological Survey or the Natural History Museum id unit.

From BBC ● Feb. 19, 2026

The more specific term i.e., short for the Latin id est, means “that is.”

From "Woe Is I" by Patricia T. O'Conner

When security personnel opened it, it was found to contain "another recording device" similar to the one discovered, as well as Alfozan's wallet and ID.

From BBC ● Oct. 14, 2026

Savage is adamant about keeping security focused on serving trans patrons, describing the difficult experience of being harassed by security guards at other clubs if the gender on your ID doesn’t match how you present.

From Los Angeles Times ● Oct. 8, 2026

I saw R.E.M. for the first time the night I graduated high school in 1981, when I took myself and my fake ID to a club in Mt.

From Salon ● Oct. 7, 2026

The crew’s morning began in Kyiv before dawn with an air-raid alert and an evacuation of the station, recalls conductor Natalia Matsiiuk as she checks people’s tickets and ID.

From The Wall Street Journal ● Oct. 4, 2026

“Each person’s key is their photo ID, which must contain a magnetic stripe.”

From "City Spies" by James Ponti

“Everybody says, ‘Of course, I’d leave a note,’” says Chase Thiel, senior associate dean at the University of Wyoming.

From The Wall Street Journal ● Oct. 22, 2026

“So if you ask me kind of what the overall toy industry is going to do, I’d probably give you an ‘I don’t know.’”

From MarketWatch ● Oct. 22, 2026

“It was very futuristic and just visually different than anything that I’d ever done before. And it’s so rare that you get the opportunity to be so expressive and to be so big on screen.”

From Los Angeles Times ● Oct. 22, 2026

"There's nothing wrong with it. I'd feel awkward sitting there if I didn't make a purchase. I'd rather leave the seats for those who made purchases and need the seats," another Weibo user commented.

From BBC ● Oct. 22, 2026

Their story painted a sappy, romantic picture that I’d idolized.

From "Legendary Frybread Drive-In" by Cynthia Leitich Smith

Chrysalis or -id: applied specifically to the intermedial stage between larva and adult in butterflies: see pupa.

From Explanation of Terms Used in Entomology by John. B. Smith

It was the essential nature of the marriage right, discussed at length in Zablocki, see id., at 383-387, that made apparent the law’s incompatibility with requirements of equality.

From MSNBC ● Jun. 26, 2015

It was the essential nature of the marriage right, discussed at length in Zablocki, see id., at 383–387, that made apparent the law’s incompatibility with requirements of equality.

From Time ● Jun. 26, 2015

“If you look at it in Freudian terms, it’s like the id. It’s this unmasked side of ourselves,” he says.

From Time ● Apr. 17, 2014

The court found that the appellant “plainly manifested,” id. at 17, an expectation that his email would not be scrutinized.

From Forbes ● Feb. 8, 2011

He describes Bartholomew as not unlike his brother, but not so tall, less affable in manner, and more stern in disposition, id. tom. ii. p.

From The Discovery of America Vol. 1 (of 2) with some account of Ancient America and the Spanish Conquest by John Fiske

Curtis introduced the manager of the Magic Lantern Cinema of Ketchum, Id., who spoke about being traumatized by John Carpenter’s original “Halloween,” Curtis’ breakout role.

From Los Angeles Times ● Aug. 27, 2021

Local bans on personal fireworks have also been implemented in Montana's Yellowstone National Park and other cities like Boise, Id. and Santa Fe, N.M., are working to follow suit.

From Fox News ● Jul. 4, 2021

Antipholis, thus Id. conj. a nipping hate Heath conj. unkind debate Collier MS.

From The Comedy of Errors The Works of William Shakespeare [Cambridge Edition] [9 vols.] by William George Clark

Take the estimates, the budget, presented by the minister De ca Hacienda, for the past year of 1842:— Revenue 1842, 879,193,400 reals Id. expenditure, 1,541,639,800 id.

From Blackwood's Edinburgh Magazine — Volume 53, No. 331, May, 1843 by Various

See the Act of June 7, 1785: Id., vol. i. p.

From Democracy in America — Volume 1 by Henry Reeves

You can also put his documents in a safe place, ID.; verification of all current income, including Social Security and records of assets.

From MarketWatch ● Aug. 5, 2026

“They refuse to give ID. They’re driving regular cars with tinted windows and in some cases out-of-state license plates,” she said.

From Los Angeles Times ● Jun. 22, 2025

“And obviously I couldn't do face ID. So it was a question of having a passcode.”

From BBC ● Sep. 24, 2024

“You cannot take medical insurance. That’s wild. You cannot get an ID. Without ID, you cannot open a banking account.”

From Seattle Times ● Dec. 25, 2021

“Everything got very quiet. There was two hundred dollars in it, and all of Bunny’s ID. The policeman who’d found it said, ‘I think we’d better contact this boy’s family.’

From "The Secret History" by Donna Tartt

The island’s owners, brothers Andrew, James and Peter Buttle, their company Whakaari Management Ltd. and tour operators I.D.

From Seattle Times ● Jul. 10, 2023

He returned with my I.D. and a freshly printed ticket, and informed me that I had 15 days to plead not guilty.

From Slate ● Jun. 21, 2023

Mr. Nelson, a bakery worker, said he lost his I.D. and birth certificate in the collapse.

From New York Times ● Jun. 7, 2023

The studio motored along, with a new class of top artists such as Jhene Aiko, Lizzo, Marcus Mumford and acclaimed hip-hop producer No I.D. coming through to create.

From Los Angeles Times ● Mar. 20, 2023

To reschedule his appointment, I'd had to take his I.D. card to the office.

From "Newjack: Guarding Sing Sing" by Ted Conover

Like the first silent performers, the animated Minions are mutely expressive ids designed to play like gangbusters around the globe.

From Los Angeles Times ● Jul. 1, 2026

In the story, that didn’t matter; its currency was “badassery,” a vapid principle many of us worship with our ids.

From Slate ● Oct. 15, 2018

Working outside the studio system, often on shoestring budgets and on personal projects, they have more leeway to barf their ids up onto the screen, sometimes with deeply bizarre results.

From The Verge ● Jan. 31, 2018

Late at night, the ids of his callers and guests flash like dorsal fins.

From New York Times ● Sep. 21, 2017

Each id contains the primary constituents of a whole individual, so that several ids are concerned in the development of a new individual.

From Evolution in Modern Thought by August Weismann

Investigators later ID’d a 17-year-old as their suspect.

From Los Angeles Times ● Jul. 16, 2025

Rodgers, in a silky double-breasted suit and matching dress shirt that paint-chip enthusiasts might have ID’d as “spilled merlot” or “Miss Havisham’s gate,” was seated just behind Nicholaw.

From New York Times ● Jul. 24, 2023

“Anyone can buy, without being carded or ID’d, a can of Reddi-wip or any other canister of whipped cream,” Addabbo told the AP.

From Seattle Times ● Sep. 2, 2022

You’ve been doing it for the last year or so where people are just walking around ID’d as being Facebook contractors and they’re just capturing what they see with sensors on their glasses.

From The Verge ● Nov. 1, 2021

“We ID’d a few of those guys, and we went out and brought those guys in.”

From Washington Post ● Apr. 7, 2020

She also ID’ed the man’s hand in the video as her husband’s, according to Newsweek.

From Fox News ● Jul. 15, 2019

The hacker was first ID'ed as a member of LulzSec last month, when private chat logs were leaked to the press.

From Salon ● Jul. 21, 2011

But beware of merely ID’ing a tree, snapping a pic and moving on.

From Los Angeles Times ● Jun. 1, 2023

In a tweet sent Wednesday, Scott-Railton said that details surfaced by other online sleuths had led “to high-confidence ID’ing of more troubling characters” and were referred to the FBI.

From Los Angeles Times ● Jan. 17, 2021

“As we started ID’ing people,” says Schulte, “we realized there weren’t a lot of people who had moved.”

From Slate ● Jan. 4, 2012

Zachs with an H and Zacks with a K. All these men have lived in my phone contacts, unceremoniously IDed with the last name “Hinge” like ear tags on cattle monitored for progress.

From Los Angeles Times ● Oct. 26, 2022

The user also tested it out and found some poor results: “One of my harvestman photos was IDed as a jumping spider, one as a termite, and another one as a crane fly.”

From Slate ● Jul. 9, 2022

New York State plans to approve as many as three casino licenses for the city, and operators and politicians have IDed Times Square as a potential location.

From Slate ● May 26, 2022

Kevin Sheekey, the campaign manager, wrote on Twitter that “3 is the total number of NDAs that have been IDed over thirty+ years pertaining directly” to Mr. Bloomberg.

From New York Times ● Feb. 21, 2020

This must be the vial he’d IDed as Isaac.

From "The Marrow Thieves" by Cherie Dimaline

Another study found that PictureThis worked better than other apps at identifying 17 toxic plants, but it still wasn’t exactly great, IDing 59 percent of them correctly.

From Slate ● Jul. 9, 2022

Or are some so insulated that they don’t know you don’t have to start every text by IDing yourself?

From Slate ● Apr. 26, 2018

When campaigns set out to identify voters’ preferences, what canvassers call IDing, they try to reach people on their home phone line or at their doorstep, because that’s where they’re registered to vote.

From Slate ● May 8, 2012

“Without it you were stuck with somehow IDing these voters.”

From Slate ● May 8, 2012

Wallace wound up the piece by IDing Gastroenterologist as a virtuoso response to the blue flow and schizoid flip of the Tube in its own terms.

From Slate ● Mar. 30, 2012

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