adj.
n. He who, or that which, accompanies. Lamb. [ 1913 Webster ]
n. [ F. accompagnement. ] That which accompanies; something that attends as a circumstance, or which is added to give greater completeness to the principal thing, or by way of ornament, or for the sake of symmetry.
n. The performer in music who takes the accompanying part. Busby. [ 1913 Webster ]