kill off
US /kɪl ɔf/
UK /kɪl ɔf/
1.
to destroy or remove completely
:
•
The new pesticide was designed to kill off all the insects in the garden.
•
The company's poor management eventually killed off the business.
2.
to make someone or something stop existing or being popular
:
•
The new technology threatens to kill off traditional industries.
•
The director decided to kill off the main character in the final episode.