Definition of affirm

< affinity group

affirmation >

af·firm    (-fûrm) KEY 

VERB:
af·firmed, af·firm·ing, af·firms
VERB:
tr.

1. To declare positively or firmly; maintain to be true.
2. To support or uphold the validity of; confirm.

VERB:
intr.
Law

To declare solemnly and formally but not under oath.

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ETYMOLOGY:
Middle English affermen, from Old French afermer, from Latin affirmre : ad-, ad- + firmre, to strengthen (from firmus, strong; see dher- in Indo-European roots)

OTHER FORMS:
af·firma·ble(Adjective), af·firma·bly(Adverb), af·firmant(Adjective)(Noun), af·firmer(Noun)