A blow that causes the recipient to fall or move backwards, a knock back; a recoil. / Something that impedes or reverses progress; a setback. / (UK, Australia, informal) A rejection; a refusal.

(rare) With a knocking sound or motion.

plural of knockstone

(mining) A block upon which ore is broken up.

(colloquial) Tending to knock.

plural of knockback

(informal) A violent collision experienced by a person. / (informal) A violent physical confrontation.

Alternative form of knocker-up

(Britain, historical) A person whose job was to go from house to house in the early morning and wake up workers by tapping on the bedroom window with a long pole or similarly convenient implement.

(archaic) second-person singular simple present form of knock