To cause a steady rhythmic vibration, usually by plucking. / To make a monotonous drumming noise.

To furnish with thrums; to insert tufts in; to fringe. / (nautical) To insert short pieces of rope-yarn or spun yarn in.

(botany) Having the anthers raised above the stigma, and visible at the throat of the corolla, as in long-stamened primroses.

With a thrumming sound or vibration.