| Noun | 1. | celerity - a rate that is rapid pace, rate - the relative speed of progress or change; "he lived at a fast pace"; "he works at a great rate"; "the pace of events accelerated" fleetness - rapidity of movement; "fleetness of foot" immediateness, instancy, instantaneousness, immediacy - the quickness of action or occurrence; "the immediacy of their response"; "the instancy of modern communication" expeditiousness, despatch, dispatch, expedition - the property of being prompt and efficient; "it was done with dispatch" promptitude, promptness - the characteristic of doing things without delay |