swear in

verb

1. (tr, adverb) to administer an oath to (a person) on his assuming office, entering the witness box to give evidence, etc

Idioms and Phrases

Administer a legal or official oath to, as in The new mayor will be sworn in tomorrow. [c. 1700]

Related Words

• accredit 
• assign 
• authorize 
• designate 
• elect