at

In, near, or in the general vicinity of (a particular place).

Caesar was at Rome.

A climate treaty was signed at Kyoto in 1997.

In, near, or in the general vicinity of (a particular place).

She's at Oxford University, studying chemistry.

In, near, or in the general vicinity of (a particular place).

He used to be at Lehman Brothers. Now he's at Merrill Lynch.

'Where does he work?' — 'I think he's still at the solicitors.'

In, near, or in the general vicinity of (a particular place).

Target at five miles. Prepare torpedoes.

Look out! UFO at two o'clock!

Present or taking place during (an event).

Was he at the meeting?

There was a big fight at the class reunion.

The at sign (@).

Alternative form of 'at (relative pronoun; reduced form of “that” and/or “what”).

Tak us t’ foxes, t’ little foxes at spoils t’ veynes: fer our veynes hev tender grapes.