to admit to be real or true; recognize the existence, truth, or fact of:to acknowledge one's mistakes.
to show or express recognition or realization of:to acknowledge an acquaintance by nodding.
to recognize the authority, validity, or claims of:The students acknowledged the authority of the student council.
to show or express appreciation or gratitude for:to acknowledge a favor.
to indicate or make known the receipt of:to acknowledge a letter.
to take notice of or reply to:to acknowledge a greeting.
Lawto confirm as binding or of legal force:to acknowledge a deed.
1475–85; acknowleche, apparently either Middle English aknou(en) to recognize (Old English oncnāwan; see a-1, know) + -leche noun, nominal suffix (Old English *-lǣce, by-form of -lac; compare knowledge,wedlock); or blend of, blended aknouen and knoulecheknowledge; then a- was mistaken for ac-
1.See corresponding entry in Unabridged concede, confess, grant. Acknowledge,admit,confess agree in the idea of declaring something to be true. Acknowledge implies making a statement reluctantly, often about something previously denied:to acknowledge a fault.Admit especially implies acknowledging something under pressure:to admit a charge.Confess usually means stating somewhat formally an admission of wrongdoing, crime, or shortcoming:to confess guilt; to confess an inability to understand.
1.See corresponding entry in Unabridged deny, disclaim, disavow.