- Verb. (transitive) To furnish or give experimental knowledge of; to make (one) to know; to make familiar; -- followed by 'with'.
- Verb. (ditransitive) To communicate notice to; to inform; to make cognizant; -- followed by 'with' (formerly, also, by 'of'), or by 'that', introducing the intelligence; as, to acquaint a friend with the particulars of an act.
- Verb. (obsolete, transitive) To familiarize; to accustom.
- Adjective. (obsolete) Acquainted.