noun

1. A state of being acquainted with a person; originally indicating friendship, intimacy, but now suggesting a slight knowledge less deep than that of friendship; acquaintanceship.

   “I know of the man; but have no acquaintance with him.”

2. A person or persons with whom one is acquainted.

3. Such people collectively; one's circle of acquaintances (with plural concord).

Synonyms: familiarity, fellowship, intimacy, knowledge