a verbal emulation of a knocking sound

plural of knock knock

A knock-knock joke

(colloquial, often childish) A phrase used to introduce a "knock knock joke" / (colloquial, often childish) A phrase used in lieu of knocking (e.g. on the door), when it is not possible to knock.

plural of knocking

(transitive, intransitive, rugby) To commit a foul by knocking the ball forward.

present participle of knock in

simple past tense and past participle of knock in

(card games, archaic) The game of lanterloo.

(obsolete, Oxford University slang) To enter college after hours—after half-past ten at night when the doors have been locked.