knocking UK /ˈnɒkɪŋ/US /ˈnɑkɪŋ/noun 2forms 1phrases 3 noun2 •An act in which something is knocked on, or the sound thus producedThese strange openings and closings and knockings were warnings and reminders from the spirits who attend the dying. — 1893 •A repetitive ping, knock, or similar sound coming from an engine in which there are repeated uncontrolled explosions in the combustion chamber.Sir―I was greatly interested in a short article in The Motor Cycle on the subject of engine knocking. — 1914 formsknockings Phrases with knocking come knockingTo arrive unanticipated and uninvited. knocking on heaven's doorDying, close to death. sock-knockingstunning, amazing, very impressive.
