acquaintance

noun4

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.

   • Montgomery was an old acquaintance of Ferguson. — 1848
3. •
   Such people collectively; one's circle of acquaintances (with plural concord).

   • Having therefore consulted with my Wife, and some of my Acquaintance, I determined to go again to Sea. — 1726
4. •
   Personal knowledge (with a specific subject etc.).

   • The words of these songs were either without meaning, or derived from an idiom with which Watt, a very fair linguist, had no acquaintance. — 1953