In the direction of
“George then threw the ball straight at me.”
In, near, or in the general vicinity of a particular place
“The shop is at 1013 East Walnut, next door to Ernie's Steakhouse.”
At a given period or instant of time
“The meeting will take place at noon.”
Denotes a price
“I have bought it at three farthings.”
In, or undergoing, a state of
“She once described how, as a teenager, she was at loggerheads with her father.”
Indicates a (precise) position on a scale or in a series
“Many of them finally decide to sell at relatively low prices after the high price point has been reached and passed.”
Because of
“I laugh at the ludicrosity of her declaration.”
By means of
“These hogs will all be sold at auction.”
Holding a given speed or rate
“We were driving at fifty miles per hour.”
On the subject of
“I was never good at chemistry in school.”
Indicating a deadline or the end of a particular time period
The at sign
“Homer gives his email, chunkylover53 at aol.com, to Dexter Colt in the episode so that they can keep in contact.”
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