What is the meaning of Acquaintance?

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.

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.).

Alternative form of acquantance

Source: wiktionary.org