CONCERT

I. noun Etymology: French, from Italian ~o, from ~are Date: 1571 agreement in design or plan ; union formed by mutual communication of opinion and views, musical harmony ; concord , a public performance (as of music or dancing), ~ adjective II. verb see: certain Date: 1652 transitive verb to make a plan for , to settle or adjust by conferring and reaching an agreement , intransitive verb to act in harmony or conjunction