at

1
[ at; unstressed uht, it ]
/ æt; unstressed ət, ɪt /

preposition

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Idioms for at

    be at (someone), to be sexually aggressive toward (a person): She's pregnant again because he's at her morning, noon, and night.
    where it's at, Informal. the place where the most interesting or exciting things happen: Emma says that Rome is definitely where it's at now.

Origin of at

1
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-

Definition for at (2 of 9)

at2

or att

[ aht, at ]
/ ɑt, æt /

noun, plural at or ats.

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

Origin of at

2
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

Definition for at (3 of 9)

At1

abbreviation

Definition for at (4 of 9)

At2

Symbol, Chemistry.

astatine.

Definition for at (5 of 9)

AT

achievement test.

Definition for at (6 of 9)

aT

attotesla.

Definition for at (7 of 9)

at-

variant of ad- before t: attend.

Definition for at (8 of 9)

at.

atmosphere.
atomic.
attorney.

Definition for at (9 of 9)

A.T.

Atlantic time.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for at (1 of 6)

at1
/ (æt) /

preposition

Word Origin for at

Old English æt; related to Old Norse at to, Latin ad to

British Dictionary definitions for at (2 of 6)

at2
/ (ɑːt, æt) /

noun plural at

a Laotian monetary unit worth one hundredth of a kip

Word Origin for at

from Thai

British Dictionary definitions for at (3 of 6)

at3

the internet domain name for

Austria

British Dictionary definitions for at (4 of 6)

At

the chemical symbol for

astatine

symbol for

Also: A ampere-turn

British Dictionary definitions for at (5 of 6)

AT

abbreviation for

attainment target

British Dictionary definitions for at (6 of 6)

at.

abbreviation for

Also: atm atmosphere (unit of pressure)
atomic
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

Medical definitions for at (1 of 2)

At

The symbol for the elementastatine

Medical definitions for at (2 of 2)

at-

pref.

Variant ofad-
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for at

At

The symbol for astatine.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.