A remark or passage in a play that is intended to be heard by the audience but not by the other characters. The actor delivered an aside to the audience, revealing his true intentions.
A remark, often made in a low voice, that is not intended to be heard by everyone present. I tried to ignore my mother's whispered asides.
A remark or comment that is not directly related to the main topic of discussion. During the meeting, she made an aside about her recent vacation.