1. acts as a deputy or substitute for someone in their absence or on their behalf
Usage: British English spelling; American English uses 'deputizes'; third person singular present tense

Examples

• The vice president deputises for the president when he is abroad.
• She deputises for the manager during his vacation.
• The assistant deputises in all official matters when the director is unavailable.
• He regularly deputises for the chief executive at board meetings.
• The senior officer deputises for the commissioner on ceremonial occasions.