I. noun
( -s )
Etymology: Middle English, from gerund of tumblen to tumble — more at tumble
1. : the act or process of tumbling
2. : the skill, practice, or sport of executing gymnastic tumbles
3. : a continuous violent pitching rotation of an aerodynamic body
II. adjective
Etymology: Middle English, from present participle of tumblen to tumble
: tipped or slanted to the right or left of vertical position — used especially of a cattle brand
the Tumbling T brand
— see brand illustration