Definition of Knockout

1. Noun. A very attractive or seductive looking woman.

Exact synonyms: Beauty, Dish, Looker, Lulu, Mantrap, Peach, Ravisher, Smasher, Stunner, Sweetheart
Generic synonyms: Adult Female, Woman
Derivative terms: Dishy, Stun

2. Adjective. Very strong or vigorous. "A severe blow"
Exact synonyms: Hard, Severe
Similar to: Strong
Derivative terms: Severeness

3. Noun. A blow that renders the opponent unconscious.
Exact synonyms: Kayo, Ko
Specialized synonyms: Technical Knockout, Tko
Generic synonyms: Blow
Derivative terms: Knock Out

Definition of Knockout

1. a. That knocks out; characterized by knocking out; as, a knock-out blow; a knock-out key for knocking out a drill from a collet.

2. n. Act of knocking out, or state of being knocked out.

Definition of Knockout

1. Noun. The act of making someone unconscious, or at least unable to come back on their feet within a certain period of time; a TKO. ¹

2. Noun. (informal) Something wildly popular, entertaining, or funny. ¹

3. Noun. (informal) A very attractive person, especially a beautiful woman. ¹

4. Noun. A partially punched opening meant for optional later removal. ¹

5. Noun. (genetics) The deactivation of a particular gene. ¹

6. Noun. (genetics) A creature engineered with a particular gene deactivated. ¹

7. Noun. (printing) An event where a foreground color causes a background color not to print. ¹

8. Noun. (sports) A tournament, in which a team or player must beat the opponent in order to progress to the next round. ¹

9. Adjective. Rendering someone unconscious. ¹

10. Adjective. Amazing; gorgeous; beautiful. ¹

11. Adjective. (genetics) Designating an organism in which a particular gene has been removed or deactivated. ¹

¹ Source:

Definition of Knockout

1. a blow that induces unconsciousness [n -S]

Medical Definition of Knockout

1. Informal term for the generation of a mutant organism in which the function of a particular gene has been completely eliminated (a null allele). See: homologous recombination, transposon. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Knockout Pictures

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Lexicographical Neighbors of Knockout

knocking down
knocking on heaven's door
knocking shop
knocking shops
knocking up
knockout (current term)
knockout drops
knockout mouse
knockout punch
knocks about
knocks around
knocks down
knocks off
knocks up

Literary usage of Knockout

Below you will find example usage of this term as found in modern and/or classical literature:

1. Microbial and Phenotypic Definition of Rats and Mice: Proceedings of the by National Research Council Staff, ebrary, Inc, National Research Council, International Committee, Commission on Life Sciences, National Academy of Sciences (1999)
"Of the large number of reports that have been published recently on transgenic and knockout experiments in mice, many have described significant effects of ..."

2. The Terrible Jews by Abraham Myerson (1922)
"The Plot Develops a knockout Punch "Thank Heaven," I exclaimed as I finished the last chapter, "the pest has gone away for good. ..."

3. Harmful Non-Indigenous Species in the United States (1994)
"This inducible knockout technique potentially allows the animals to develop normally until the time at which the investigator decides to remove the gene of ..."

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