In, near, or in the general vicinity of a particular place.
Indicating occurrence in an instant of time or a period of time relatively short in context or from the speaker’s perspective.
In the direction of (often implied to be in a hostile or careless manner).
Denotes a price.
Occupied in (activity).
In a state of.
Indicates a position on a scale or in a series.
Because of.
Indicates a means, method, or manner.
Holding a given speed or rate.
On the subject of; regarding.
Bothering, irritating, causing discomfort to
(also as at; before dates) On a particular date.

The at sign (@).

Rare form of @; to reply to or talk to someone, either online or face-to-face. (from the practice of targeting a message or reply to someone online by writing @name)

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

Alternative form of att (Laos currency unit)

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At them, he began selling these handcrafted dolls he called "babies".