noun

1. An incidental remark made quietly so as to be heard by the person to whom it is said and not by any others in the vicinity.

2. A brief comment by a character addressing the audience, unheard by other characters.

3. A minor related mention, an afterthought.

Synonyms: side note, sidebar

adverb

1. To or on one side so as to be out of the way.

   “Move aside, please, so that these people can come through.”