An act in which something is knocked on, or the sound thus produced

plural of knock

Third-person singular simple present indicative form of knock

plural of knocking

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

(US) Of a warrant, raid, etc.: allowing police to enter a property without immediate prior notification of the residents, as by knocking or ringing a doorbell.

present participle of knock in

Third-person singular simple present indicative form 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.