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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  

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 2 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 3 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. 4 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 5 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 6 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 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

I'd 8 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 9 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

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:

So what was it like for you creating this character that was almost like your id unleashed?

From Los Angeles Times Jun. 18, 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

By 2006, American Lawyer magazine observed he “has become so indispensable to Citigroup that he carries an employee id card from the bank.”

From The Wall Street Journal Feb. 6, 2026

They war between rationality and heart, ego and id.

From Salon Jun. 14, 2025

“So that id why you’re acting like this!”

From "The Red Umbrella" by Christina Gonzalez

Bonta’s office had argued in court that his office applied the same standard of review to the voter ID measure as every other ballot measure that has come before his office.

From Los Angeles Times Aug. 7, 2026

Authorities said they discovered a small cache of firearms at his home along with a security ID.

From Los Angeles Times Aug. 6, 2026

Currently, sellers must be at least 18 and show ID, or have parental permission, while buyers aren’t required to show ID.

From The Wall Street Journal Aug. 5, 2026

Nonetheless, Cornell says its Sound ID tool has been used for 4.4 billion identifications.

From BBC Jul. 27, 2026

“We’re ID, right? ID says hi. I don’t think you need to have a negative airflow room and all that.”

From "Mountains Beyond Mountains" by Tracy Kidder and Michael French

If he was sitting next to me on a plane and asking for single-parenting advice, I’d tell him to find someone to teach him how to cook.

From Los Angeles Times Aug. 17, 2026

Conrad: I’d come up with something like the scratchy safety vests they make you wear when you go fishing on a boat.

From Los Angeles Times Aug. 17, 2026

“I never thought I’d be in a battle with a data center,” said Bare.

From The Wall Street Journal Aug. 16, 2026

"I doubt I could have done that if I'd been employed," she says, "and I think I'd have been weeping in the toilets at the office."

From BBC Aug. 15, 2026

And even if I liked sports, I’d still look out of place.

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 Time 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 MSNBC 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

As to the interpretation which the Baganda put on the act of jumping or stepping over a woman, see id., pp.

From Balder the Beautiful, Volume I. A Study in Magic and Religion: the Golden Bough, Part VII., The Fire-Festivals of Europe and the Doctrine of the External Soul by Sir James George Frazer

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

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

From Democracy in America — Volume 1 by Henry Reeves

Id. p. 113.524.i.e. the age of Louis XV.

From History of Free Thought in Reference to The Christian Religion by Adam Storey Farrar

Three times it is used of hunting horns, Titus II, ii, and Id. l.

From Shakespeare and Music With Illustrations from the Music of the 16th and 17th centuries by Edward W. (Edward Woodall) Naylor

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

It aims to sell 160,000 to 200,000 ID. cars this year, though it has sold only 33,300 through April.

From Reuters May 25, 2022

“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

A group of organizations including Amnesty International filed a class-action suit against the government in 2021, calling for a clearer legal basis for I.D. stops, among other changes.

From New York Times Jul. 4, 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

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

One I had had trouble with before, and I advised the officer at the gate to get his I.D. card on the way out.

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

And that in whatever jazzy afterlife exists for wayward novelists, they’re up there ashing carelessly into their martinis, and letting ids and peckish wildcats run free.

From New York Times Nov. 25, 2023

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

I’ll leave word no one ids to gome to my funeral, eider.”

From Polly's Business Venture by Lillian Elizabeth Roy

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

From Los Angeles Times Jul. 16, 2025

Davis ID’d sweep but couldn’t get outside to turn it back.

From Washington Post Dec. 14, 2022

I ID’d the Cargylls by consulting various online resources after I watched the episode screener.

From New York Times Oct. 16, 2022

“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

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

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

From Slate May 8, 2012

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

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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