accompany

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To be or go with, especially as a companion.
• intransitive verb To provide with an addition; supplement.
• intransitive verb To exist or occur at the same time as.
• intransitive verb Music To perform an accompaniment to.
• intransitive verb Music To play an accompaniment.

from The Century Dictionary.

• 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.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To go with or attend as a companion or associate; to keep company with; to go along with; -- followed by with or by.
• transitive verb obsolete To cohabit with.
• intransitive verb obsolete To associate in a company; to keep company.
• intransitive verb obsolete To cohabit (with).
• intransitive verb (Mus.) To perform an accompanying part or parts in a composition.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb transitive To go with or attend as a companion or associate; to keep company with; to go along with.
• verb transitive To supplement with; add to.
• verb intransitive, music To perform an accompanying part or parts in a composition.
• verb transitive, music To perform an accompanying part next to another instrument.
• verb intransitive, obsolete To associate in a company; to keep company.
• verb intransitive, obsolete To cohabit (with).
• verb transitive, obsolete To cohabit with; to coexist with; occur with.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb go or travel along with
• verb be present or associated with an event or entity
• verb perform an accompaniment to
• verb be a companion to somebody