1.Definition: a person with whom you are acquainted

"I have trouble remembering the names of all my acquaintances", "We are friends of the family"

Related Noun(s):friend

Category: People

2.Definition: a relationship less intimate than friendship

Related Noun(s):acquaintanceship

Category: General

3.Definition: personal knowledge or information about someone or something

Related Noun(s):conversance, conversancy, familiarity

Category: General