from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The act or an instance of knocking down.
  • noun The condition of being knocked down.
  • noun An overwhelming blow or shock.
  • noun Something designed to be easily assembled or disassembled.
  • adjective Strong enough to knock down or overwhelm; powerful.
  • adjective Designed to be easily assembled or disassembled.
  • adjective Reduced.

from The Century Dictionary.

  • Such as to knock to the ground; hence, overwhelming; irresistible: as, a knock-down blow; a knock-down argument.
  • Constructed so as to be readily knocked down or taken apart for convenience in transportation; prepared and kept in separate parts, ready to be put together as a whole.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Of force sufficient to fell or completely overthrow.
  • adjective Designating a rivet end to be formed into a head by upsetting in fastening.
  • adjective 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.
  • adjective Made or constructed so as to be capable of being knocked down or taken apart, as for transportation.
  • noun Slang. That which knocks one down; something that overpowers or overwhelms, as strong liquor; specif., a kind of ale or beer that is very strong.
  • noun A knocking down; a felling by a knock, as of a combatant, or of an animal; a blow that overwhelms; also, a fist fight.
  • noun 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.
  • noun To strike down; to fell; to prostrate by a blow or by blows.
  • noun To assign to a bidder at an auction, by a blow or knock of the auctioneer's hammer; to sell at an auction.
  • noun To take apart; to dissassemble.
  • noun To reduce or discount the price of.
  • noun To earn (an income).

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun An act of knocking down or the condition of being knocked down.
  • noun An overwhelming blow.
  • noun genetics A genetically modified organism that carries one or more genes in its chromosomes that has been made less active or had its expression reduced.
  • noun genetics The use of a reagent such as an oligonucleotide with sequence complementary to an active gene or its mRNA transcript, to interfere with the expression of said gene.
  • noun nautical The condition of a sailboat being pushed abruptly to horizontal, with the mast parallel to the water surface.
  • noun soccer a short pass played downwards, for example from the head onto someone's feet.
  • adjective powerful enough to overwhelm or knock down
  • adjective reduced in price

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective (furniture) easily assembled and dismantled
  • noun a blow that knocks the opponent off his feet
  • verb knock down with force
  • verb cause to come or go down
  • verb shatter as if by explosion
  • adjective strong enough to knock down or overwhelm


from Wiktionary, Creative Commons Attribution/Share-Alike License

knock +‎ down


Help support Wordnik (and make this page ad-free) by adopting the word knockdown.


  • Hey Clay-You believe in "knockdown" power of a bullet?


  • He led the team in knockdown blocks as a junior and senior.

  • His outstanding blocking skills for the Mavericks 'ground game saw him rank among the team leaders in knockdown blocks every season ...

  • Figure 1: Short-term knockdown of DISC1 elicits spine enlargement in rat primary cortical neurons.

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  • (a) Spine changes in mature neurons by short-term knockdown (2 d) of DISC1 using two independent RNAi.

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  • Since completing the factory in 2002, Pyeonghwa has imported partially built cars, in a form called knockdown kits, from manufacturers such as Italy's Fiat SpA and China's Brilliance Automotive Holdings Ltd.

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  • The guy was defenseless by then, and the knockdown was a mercy.

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  • The guy was defenseless by then, and the knockdown was a mercy.

    Becoming Holyfield

  • The guy was defenseless by then, and the knockdown was a mercy.

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  • A knockdown is a knockdown, no matter what you say.

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