Entry 4 senses · 4 variants Webster, 1913 Bumble /bŭm'-bəl/ · Bum·ble · IPA /ˈbʌmbəl/ n. v. i. v. i. v. t. 01 n. The bittern. 1. The bittern.(Zool.) [Local, Eng.] 02 v. i. To make a hollow or humming noise, like that of a bumblebee; to buzz; to cry as a bittern. 1. To make a hollow or humming noise, like that of a bumblebee; to buzz; to cry as a bittern. “As a bittern bumbleth in the mire.” — Chaucer. 03 v. i. to act ineptly or without clear understanding of what one is doing; to blunder; to stumble about; -- sometimes used with around. 1. to act ineptly or without clear understanding of what one is doing; to blunder; to stumble about; -- sometimes used with around. 04 v. t. to bungle (a task). 1. to bungle (a task).