a harmony of sounds, things, or persons; a set of instruments; an agreement.
Concent
Concentration
Concert
Conciliable
Concilium
Examples: concert of angels; of terrific vociferation; of trumpets; of voices and instruments; of Europe [agreement of power on the Eastern Question]; cat’s concert [caterwauling, hence any hideous combination of sounds]; Dutch concert [in which each performer plays a different tune].