knockout

The act of making one unconscious, or at least unable to come back on one's feet within a certain period of time; a TKO.

“The boxer scored a knockout on his opponent.”

The deactivation of anything.

informalSomething wildly popular, entertaining, or funny.

“If you've ever had a sack race, you know it's a real knockout for kids and adults alike.”

informalA very attractive person, especially a beautiful woman.

A partially punched opening meant for optional later removal.

“They left a knockout in the panel for running extra wires someday.”

geneticsThe deactivation of a particular gene.

geneticsA creature engineered with a particular gene deactivated.

printingAn event where a foreground color causes a background color not to print.

sportsA tournament in which a team or player must beat the opponent in order to progress to the next round.

“the knockout stages of the competition”

A simple game for two or more players, derived from basketball.

Short for knockout auction.

A blow that renders the opponent unconscious

Rendering someone unconscious.

“He delivered a knockout blow.”

Amazing; gorgeous; beautiful.

“You should have seen her knockout eyes.”

geneticsDesignating an organism in which a particular gene has been removed or deactivated.

Causing elimination from a competition.

Very strong or vigorous

“a hard left to the chin”

“a knockout punch”

“a severe blow”