Definitions
1.nounAn 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.nounA brief comment by a character addressing the audience, unheard by other characters.
3.nounA minor related mention, an afterthought.
4.adverbTo or on one side so as to be out of the way."Move aside, please, so that these people can come through."