A small, flat, baked good which is either crisp or soft but firm.
A sweet baked good (as in the previous sense) usually having chocolate chips, fruit, nuts etc. baked into it.
A bun.
An HTTP cookie.
A magic cookie.
An attractive young woman.
The female genitalia.
A piece of crack cocaine, larger than a rock, and often in the shape of a cookie.
Affectionate name for a cook.
A cucoloris.
To send a cookie to (a user, computer, etc.).