knockout
7 synonyms and 1 antonym for knockout, grouped by meaning and by how common each one is.
Adj — Strong or effective enough to render someone unconscious.
Synonyms
Everyday swaps
Common words most readers know — safe in any writing.
Less common
Still standard English, but they carry more weight.
Synonyms by Meaning
1. adj
Strong or effective enough to render someone unconscious.
“He won the fight with a knockout punch in the second round.”
2. adj
Strikingly attractive or impressive.
“She wore a knockout red dress to the premiere.”
Opposites
How to use knockout
The word patterns that sound natural to a native speaker.
a knockout punch
a knockout dress
a knockout performance
Etymology
A noun/adjective formed from the phrasal verb "knock out."
Full origin of knockout →Frequently asked questions
What does “knockout” mean?
The word “knockout” means strong or effective enough to render someone unconscious. In plain terms, describing something powerful enough to floor an opponent, or, informally, someone stunningly attractive.
How do you pronounce “knockout”?
“Knockout” is pronounced NOK-owt (/ˈnɑk.oʊt/ in IPA).
How do you use “knockout” in a sentence?
Here is “knockout” used in a sentence: “He won the fight with a knockout punch in the second round.”
What part of speech is “knockout”?
“Knockout” is an adjective.
Is “knockout” a common word?
“Knockout” is an uncommon word in modern English.
How many meanings does “knockout” have?
“Knockout” has 2 distinct senses listed in this dictionary. The most common is: strong or effective enough to render someone unconscious.
What is the difference between a "knockout punch" and calling someone "a knockout"?
A "knockout punch" describes a blow strong enough to render an opponent unconscious, while calling a person "a knockout" is an informal compliment meaning they are strikingly attractive.
Is describing someone as "a knockout" formal or casual?
Calling someone "a knockout" is casual, complimentary slang, and would not be used in formal or professional writing.
What phrases commonly use "knockout" as a descriptor?
"Knockout" often appears in phrases like "knockout punch," "knockout blow," and "knockout round," all drawing on the idea of something powerful enough to instantly defeat or overwhelm.
