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Kill off Meaning in English

expression

Definition

To destroy or remove all of something, especially living things, often gradually or completely.

Usage & Nuances

'Kill off' is phrasal and informal. Used often for groups (plants, animals, characters), not just one thing. Common in science, environment, and fiction. Can mean intentional or accidental elimination. Do not use for killing a single person or animal.

Example Sentences

The company killed off its old product line.

basic

The disease killed off many wild birds.

basic

Too much pesticide can kill off useful insects.

basic

Writers sometimes kill off a main character to surprise readers.

natural

The drought might kill off half the crops this year.

natural

If we kill off all the bacteria, the system won't work properly.

natural