That which knocks one down; something that overpowers or overwhelms, as strong liquor; specif., a kind of ale or beer that is very strong. [Webster 1913 Suppl.]
A knocking down; a felling by a knock, as of a combatant, or of an animal; a blow that overwhelms; also, a fist fight. [Webster 1913 Suppl.]
Something that knocks down, or takes apart, for packing or removal, as a piece of furniture; also, state of being knocked down, or taken apart. [Webster 1913 Suppl.]
knockdown, a.
Of force sufficient to fell or completely overthrow; as, a knockdown blow; a knockdown argument.. [Webster 1913 Suppl.]
Designating a rivet end to be formed into a head by upsetting in fastening. [Webster 1913 Suppl.]
Of or pertaining to the act of knocking down at an auction; specif., designating the price below which an article will not be disposed by the auctioneer. [Webster 1913 Suppl.]
Made or constructed so as to be capable of being knocked down or taken apart, as for transportation. [Webster 1913 Suppl.]