2 [no object] perform acrobatic feats, typically handsprings and somersaults in the air.
(of a breed of pigeon) repeatedly turn over backwards in flight.
3fall rapidly in amount or value:property prices tumbled
4 [with object] dry (washing) in a tumble dryer:the machine gentle tumbles the clothes in cool air for ten minutes
5 [no object] (tumble to) informal understand the meaning or hidden implication of (a situation):she’ll ring again as soon as she tumbles to what she’s done
6 [with object] informal have sexual intercourse with:he was tumbling a strange woman
7 [with object] clean (castings, gemstones, etc.) in a tumbling barrel.