dep‧u‧tize also deputise British English
1 [intransitive] British English
to do the work of someone of a higher rank than you for a short time because they are unable to do it
Jed could deputise for Stewart, if necessary.
2 [transitive] American English
to give someone below you in rank the authority to do your work for a short time, usually because you are unable to do it [↪ delegate]