Etymology
Advertisement

knock-down (adj.)

also knockdown, 1680s, from the verbal phrase knock down, attested from mid-15c. in the sense "fell to the ground;" see knock (v.) + down (adv.). As a noun from 1809. Phrase knock-down, drag-out is from 1827.

Others are reading

Advertisement
Advertisement
Definitions of knock-down

knock-down (adj.)
strong enough to knock down or overwhelm;
a knock-down blow
Synonyms: powerful
From wordnet.princeton.edu