I. ət, ˈat preposition
Etymology: Middle English, from Old English æt; akin to Old High German az at, Latin ad
Date: before 12th century
1. — used as a function word to indicate presence or occurrence in, on, or near
staying at a hotel
at a party
sick at heart
2. — used as a function word to indicate the goal of an indicated or implied action or motion
aim at the target
creditors are at him again
3. — used as a function word to indicate that with which one is occupied or employed
at work
at the controls
good at chess
4. — used as a function word to indicate situation in an active or passive state or condition
at liberty
at rest
5. — used as a function word to indicate the means, cause, or manner
sold at auction
laughed at my joke
act at your own discretion
6.
a. — used as a function word to indicate the rate, degree, or position in a scale or series
the temperature at 90
at first
b. — used as a function word to indicate age or position in time
will retire at 65
II. noun
also att ˈät
( plural at also att )
Etymology: Lao
Date: 1955
— see kip at money table
III. abbreviation
1. airtight
2. atmosphere
3. atomic