To fall with a thud or heavy impact. Also spec. in Mining.

intransitive. To come with a blast or gust, as the wind; sometimes including the notion of sound. Scottish.

intransitive. To fall or move heavily with a dull noise.

intransitive. To make a dull thudding sound; to move with a ‘whump’; to bang or thump; to strike (with a thud).

intransitive. To make a brief plosive sound (see phut, n.); to move or travel while making this sound.

colloquial. transitive. To strike (something hard or unyielding), esp. with an audible, typically hollow-sounding, heavy thump; to bump, to bang.

A dull hollow sound, as of a bullet striking something. Also as v. intransitive, to strike with a ‘whunk’.

intransitive. To make the sound described under clonk, n.; also = clunk, v. 1.