at it Definition

at
prep

1. Used to indicate position or place: in, within, on, near, etc.

Example: worked at a local factory
Thesaurus: in the vicinity of, by, near, on, in, about.
2. Towards, in the direction of something.

Example: working at getting fit
3a. Used to indicate a position in time: around; on the stroke of;

Example: The train arrives at six
3b. Used to indicate a position in time: having reached the age of.

Example: At 17 you can start to drive
4. With, by, beside, next to, etc.

Example: annoyed at her
5. Engaged in; occupied with.

Example: children at play
6. For; in exchange for.

Example: sold it at a profit
7. In a state of.

Example: at liberty

Idiom: at it (at it again)

Doing something (again);

euphemistic
Having sexual intercourse;

colloq
Committing crimes.

Etymology: Anglo-Saxon æt.