1. (adv.) On, or to, one side; out of a straight line, course, or direction; at a little distance from the rest; out of the way; apart.

2. (adv.) Out of one's thoughts; off; away; as, to put aside gloomy thoughts.

3. (adv.) So as to be heard by others; privately.

4. (n.) Something spoken aside; as, a remark made by a stage player which the other players are not supposed to hear.