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.

---

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

plural

at, ats

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

---

At ³ American  

abbreviation

1. ampere-turn.

---

At ⁴ American  

Symbol, Chemistry.

1. astatine.

---

AT ⁵ American  

abbreviation

1. achievement test.

2. antitank.

---

aT ⁶ American  

abbreviation

1. attotesla.

---

at- ⁷ American  

1. variant of ad- before t: attend.

---

at. ⁸ American  

abbreviation

1. atmosphere.

2. atomic.

3. attorney.

---

A.T. ⁹ American  

abbreviation

1. Atlantic time.

---

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

---

At ² British  

symbol

1. astatine

---

symbol

1. Also: A.  ampere-turn

at. ³ British  

abbreviation

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

2. atomic

---

AT ⁴ British  

abbreviation

1. attainment target

---

at ⁵ British  

/ ɑːt, æt /

noun

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

---

at ⁶ British  

abbreviation

1. Austria

---

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

Professor Marwan El Ghoch of the Department of Biomedical, Metabolic and Neural Sciences at the University of Modena and Reggio Emilia explains that this limitation makes it difficult for BMI to accurately reflect adiposity.

From Science Daily • Apr. 3, 2026

All individuals were referred to the Department of Neurosciences, Biomedicine and Movement Sciences at the University of Verona.

From Science Daily • Apr. 3, 2026

Details of organisations offering help and support with mental health, or feelings of despair are available at BBC Action Line.

From BBC • Apr. 2, 2026

Deavers now works with undergraduate students in her chemistry lab at Marian University to identify everyday sources of heavy metal exposure and share that information with the community.

From Science Daily • Apr. 2, 2026

“She is?” he asks at full volume, craning his neck for a look.

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