Knock out
verb
To make someone unconscious or fall asleep.
The blow to his head knocked him out.
Often appears as...
- knock someone out
- knockout punch
verb
To defeat or eliminate from a competition.
Our team was knocked out in the semi-final round.
Often appears as...
- knock out of the tournament
- knockout competition
verb
To create something quickly or easily.
She can knock out a new article in about two hours.
Often appears as...
- knock out a report
- knock out an essay
Usage tips
Informal
verb
To stop working or operating.
The storm knocked out the power to the house.
Often appears as...
- knock out power
- knock out the lights
verb
To impress or attract someone greatly.
Her beauty knocked me out.
Often appears as...
- knock someone out
- knockout beauty
Usage tips
Informal, Approving
Colloquial
verb
To make someone unconscious or fall asleep.
The blow to his head knocked him out.
Often appears as...
- knock someone out
- knockout punch
verb
To defeat or eliminate from a competition.
Our team was knocked out in the semi-final round.
Often appears as...
- knock out of the tournament
- knockout competition
verb
To create something quickly or easily.
She can knock out a new article in about two hours.
Often appears as...
- knock out a report
- knock out an essay
Usage tips
Informal
verb
To stop working or operating.
The storm knocked out the power to the house.
Often appears as...
- knock out power
- knock out the lights
verb
To impress or attract someone greatly.
Her beauty knocked me out.
Often appears as...
- knock someone out
- knockout beauty
Usage tips
Informal, Approving
Colloquial
Definition 1 of 5
Pro Tip 1/2Physical Unconsciousness
Used when a strong impact causes someone to lose consciousness, often related to sports or accidents.
He received a blow to the head that knocked him out.
Pro Tip 2/2Sleep Induction
Sometimes describes inducing deep sleep, without implying any violence.
The medication quickly knocked me out.
Pro Tip 1/2Physical Unconsciousness
Used when a strong impact causes someone to lose consciousness, often related to sports or accidents.
He received a blow to the head that knocked him out.
Pro Tip 2/2Sleep Induction
Sometimes describes inducing deep sleep, without implying any violence.
The medication quickly knocked me out.
Pro Tip 1/2Physical Unconsciousness
Used when a strong impact causes someone to lose consciousness, often related to sports or accidents.
He received a blow to the head that knocked him out.
Pro Tip 2/2Sleep Induction
Sometimes describes inducing deep sleep, without implying any violence.
The medication quickly knocked me out.
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