Meaning

• 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."

• A person or persons with whom one is acquainted.

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

• Personal knowledge (with a specific subject etc.).