affirm to state something as true: [+ ( that )] The suspect affirmed (that) he had been at home all evening. She affirmed her intention to apply for the post. 2 to publicly state your support for an opinion or idea: The government has affirmed its commitment to equal confirm (MAKE CERTAIN) verb to make an arrangement or meeting certain, often by telephone or writing: [+ that ] Six people have confirmed that they will be attending and ten haven't replied yet.
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