The act or process of arranging: the arrangement of a time and place for the meeting. The condition, manner, or result of being arranged; disposal: provided flowers and saw to their arrangement. A collection of things that have been arranged: the circular arrangement of megaliths called Stonehenge. A provision or plan made in preparation for an undertaking. Often used in the plural: made arrangements for surgery. An agreement or settlement; a disposition: Our dog will be looked after by arrangement with a neighbor. Music An adaptation of a composition for other instruments or voices or for another style of performance. Music A composition so arranged.