What is the meaning of @?

The symbol used as a separator between a username and a domain name in an e-mail address ("at" the domain name).

At the rate of; per.

The most common choice of configurable prefix symbol to identify a channel operator.

Prepended to the name of the user to whom a remark is addressed.

A pulse of laughter. (Thus @@@ is the transcription equivalent of ha! ha! ha! or hee! hee! hee! etc. in conventional orthography.)

In roguelike games, the player character, conventionally represented by this symbol in character-based interfaces.

At a rate of (so much each).

At (any sense).

To reply to or speak to someone, either online or face to face.

Forming gender-neutral versions of Spanish-derived words by replacing both the masculine -o and feminine -a.

By extension, sometimes used to blend other pairs of words that differ by being spelled with o vs a.

The symbol used as a separator between a username and a domain name in an e-mail address.

used to attach a qualifier to someone's name

at a rate of

Alternative form of で (de, “at”, indicating a location at which something happens)

Alternative form of あと (ato, “remaining”)

Abbreviation of amin'ny.

the symbol for the arroba unit of weight

gender-neutral replacement for masculine -o or -e and feminine -a

the symbol for the arroba unit of weight and volume

a replacement for o or e and a, to include both masculine and feminine forms

The symbol used as a separator between a username and a domain name in an e-mail address.

her biri (“each”)

Source: wiktionary.org

See also