Definitions

1. verb

to act or serve as a deputy or representative of someone, especially in an emergency or when the usual holder of a position is absent or unable to act

“The mayor deputised a senior councillor to represent her at the conference.”

2. verb

to appoint or commission someone as a deputy or representative

“The manager deputised a new team leader to oversee the project.”

3. noun

a person acting as a deputy or representative

“She was the deputise for the company’s CEO at the meeting.”