| n. | 1. | Act of knocking out, or state of being knocked out; the act of rendering a person unconscious by a blow. |
| 2. | a blow which causes a person to become unconscious. | |
| 3. | (Boxing) the winning of a boxing contest by rendering the opponent unable to stand for a specified period, usually a count of ten; - in contrast to a win by a | |
| 4. | a strikingly beautiful woman. |
| Noun | 1. | knockout - a very attractive or seductive looking woman |
| 2. | knockout - a blow that renders the opponent unconscious Synonyms: KO | |
| Adj. | 1. | knockout - very strong or vigorous; "strong winds"; "a hard left to the chin"; "a knockout punch"; "a severe blow" |