To be or exist in company with; be joined in association or combination; constitute an adjunct or concomitant to: as, thunder accompanies lightning; an insult accompanied by or with a blow; the President's message and accompanying documents.To keep company with; be associated in intimacy or companionship; act as companion to.To go along or in company with; attend or join in movement or action: as, to accompany a friend on a walk or journey; men-of-war formerly accompanied fleets of merchant ships; he was everywhere accompanied by (not with) his dog.To put in company (with); cause to be or go along (with); combine; associate: as, to accompany a remark with (not by) a bow; he accompanied his speech with rapid gestures.In music, to play or sing an accompaniment to or for: as, he accompanied her on the piano.To cohabit with.Synonyms To attend, escort, wait on, go with, convoy, be associated with, coexist.To be a companion or associate: as, to accompany with others. To cohabit.In music, to perform the accompaniment in a composition; especially, to perform the instrumental part of a mixed vocal and instrumental piece.