* Noun: It refers to a person you know slightly, but not well.
* Verb: It means to make someone familiar with something.
Here are some examples:
Noun:
* "I met an acquaintance from college at the party."
* "She has a wide circle of acquaintances."
Verb:
* "I acquainted myself with the new software."
* "The teacher acquainted the students with the rules of the classroom."