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• at
  at

  preposition

  (used to indicate a point or place occupied in space); in, on, or near.
• At
  At

  abbreviation

  ampere-turn.
• AT
  AT

  abbreviation

  achievement test.
• aT
  aT

  abbreviation

  attotesla.
• at-
  at-

  variant of ad- before t: attend.
• at.
  at.

  abbreviation

  atmosphere.
• A.T.
  A.T.

  abbreviation

  Atlantic time.

at

¹ American  

[at, uht, it] / æt, ət, ɪt /

preposition

1. (used to indicate a point or place occupied in space); in, on, or near.

   to stand at the door;

   at the bottom of the barrel.

2. (used to indicate a location or position, as in time, on a scale, or in order).

   at zero;

   at noon;

   at age 65;

   at the end;

   at the lowest point.

3. (used to indicate presence or location).

   at home;

   at hand.

4. (used to indicate amount, degree, or rate).

   at great speed;

   at high altitudes.

5. (used to indicate a direction, goal, or objective); toward.

   Aim at the mark.

   Look at that.

6. (used to indicate occupation or involvement).

   at work;

   at play.

7. (used to indicate a state or condition).

   at ease;

   at peace.

8. (used to indicate a cause or source).

   She was annoyed at his stupidity.

9. (used to indicate a method or manner).

   He spoke at length.

10. (used to indicate relative quality or value).

    at one's best;

    at cost.

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noun

1. @, a symbol that is used in email addresses to link a username to a domain name, used at the beginning of Twitter handles, and in other identifying designations on the internet.

verb (used with object)

@ed, at-ed, @ing, at-ing

1. (on social media)

   1. to tag an account that begins with the symbol @, resulting in a link to that account’s profile and a notification to the user that their account has been explicitly mentioned in someone else’s post.

      One big celebrity at-ed the restaurant, and suddenly reservations were booked for the next six weeks.

   2. to include or involve someone, or to call a person out, especially when that person does not want to be involved or singled out.

      My opinions are my own, so please don’t at my employer about the stuff I write on this site.

   3. to argue with someone, or dispute someone’s stated views, especially on social media.

      The sequel was better than the original—don’t at me!

idioms

1. where it's at, the place where the most interesting or exciting things happen.

   Emma says that Rome is definitely where it's at now.

2. be at (someone), to be sexually aggressive toward (a person).

   She's pregnant again because he's at her morning, noon, and night.

at ² American  

[aht, at] / ɑt, æt /

Or att

noun

at, plural ats plural

1. a money of account of Laos, one 100th of a kip.

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At ³ American  

abbreviation

1. ampere-turn.

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At ⁴ American  

Symbol, Chemistry.

1. astatine.

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AT ⁵ American  

abbreviation

1. achievement test.

2. antitank.

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aT ⁶ American  

abbreviation

1. attotesla.

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at- ⁷ American  

1. variant of ad- before t: attend.

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at. ⁸ American  

abbreviation

1. atmosphere.

2. atomic.

3. attorney.

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A.T. ⁹ American  

abbreviation

1. Atlantic time.

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at ¹ British  

/ æt /

preposition

1. used to indicate location or position

   are they at the table?

   staying at a small hotel

2. towards; in the direction of

   looking at television

   throwing stones at windows

3. used to indicate position in time

   come at three o'clock

4. engaged in; in a state of (being)

   children at play

   stand at ease

   he is at his most charming today

5. (in expressions concerned with habitual activity) during the passing of (esp in the phrase at night )

   he used to work at night

6. for; in exchange for

   it's selling at four pounds

7. used to indicate the object of an emotion

   angry at the driver

   shocked at his behaviour

8. slang the real place of action

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At ² British  

symbol

1. astatine

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symbol

1. Also: A.  ampere-turn

at. ³ British  

abbreviation

1. Also: atm.  atmosphere (unit of pressure)

2. atomic

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AT ⁴ British  

abbreviation

1. attainment target

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at ⁵ British  

/ ɑːt, æt /

noun

1. a Laotian monetary unit worth one hundredth of a kip

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at ⁶ British  

abbreviation

1. Austria

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Other Word Forms

Noun Inflected Forms

• at
  plural
• ats
  plural

Etymology

Origin of at¹

First recorded before 900; Middle English; Old English æt; cognate with Old Frisian et, Old Norse, Old Saxon, Gothic at, Old High German az, Latin, Old Welsh, Old Breton ad, Oscan ad-, Umbrian ař-, Old Irish, Gaulish, Phrygian ad-

Origin of at²

First recorded in 1950–55; from Lao; compare Thai ʔàt formerly, a copper coin worth one eighth of a füang, ultimately from Pali aṭṭha eight

Example Sentences

She initially listed the expansive six-bedroom, nine-bathroom Westchester home at the end of March, having purchased it just two years earlier for $4.4 million.

From MarketWatch • Jul. 8, 2026

“Re-escalation in the Persian Gulf has reignited supply concerns,” analysts at ING said.

From The Wall Street Journal • Jul. 8, 2026

—The dollar traded steady ahead of the release of the Fed’s meeting minutes for June at 1800 GMT.

From The Wall Street Journal • Jul. 8, 2026

At the same time, insurers said they expect the impact of reduced federal subsidies, which kicked in at the start of 2026, to roll through next year as well.

From The Wall Street Journal • Jul. 8, 2026

She finally found her brother, wounded and malnourished, at Camp O’Donnell in Capas, a US military base north of Manila that was occupied by the Japanese military.

From "At Last She Stood" by Erin Entrada Kelly