kill something ↔ off phrasal verb (see also kill)

1. to cause the death of a lot of living things Synonym : destroy:
Pollution is rapidly killing off plant life.

2. to stop or remove something completely Synonym : destroy:
These figures kill off any hope that the economy is poised for recovery.

[TahlilGaran] Dictionary of Contemporary English ▲

kill off
kill or end completely, destroy
The pollution in the river has killed off all of the fish.

[TahlilGaran] English Idioms Dictionary ▲

kill off something
kill or end completely, destroy
The pollution in the river has killed off all of the fish.

[TahlilGaran] English Idioms Dictionary ▲

kill off
v. To kill or end completely; destroy.
The factory dumped poisonous wastes into the river and killed off the fish.
The president suggested a new law to Congress but many members of Congress were against the idea and they killed it off.
Mother made Nancy practice her dancing an hour every day; Nancy got tired of dancing and that killed off her interest.

[TahlilGaran] English Idioms Dictionary ▲