(idiomatic) An informal greeting, not requiring a literal response. In form a question, and thus followed by a question mark. Typical responses include:

(rare) An accepted (but deprecated and rarely used) SI unit of area equal to 100 square metres, or a former unit of approximately the same extent. Symbol: a.

second-person singular simple present of be / first-person plural simple present of be / second-person plural simple present of be / third-person plural simple present of be

Of or pertaining to an area.

(mathematics) A measure of the extent of a surface; it is measured in square units. / A particular geographic region. / Any particular extent of surface, especially an empty or unused extent.

(idiomatic) When the pressure is on; when the situation is urgent or critical

In which country or region were you born or raised?

(US) a rug that only covers part of the floor of a room

(China, humorous) Why is it always you? You again?

(cartography) Of a map, having the property that equal areas on the map represent equal areas on the mapped surface.