(~s)
1.
An ~ is someone who you have met and know slightly, but not well.
The proprietor was an old ~ of his...
N-COUNT: oft with poss
2.
If you have an ~ with someone, you have met them and you know them.
...a writer who becomes involved in a real murder mystery through his ~ with a police officer...
N-VAR: oft poss N, N with n, on N
3.
Your ~ with a subject is your knowledge or experience of it. (FORMAL)
They had little or no ~ with philosophy or history...
N-UNCOUNT: usu with supp, oft N with n
4.
When you make someone’s ~, you meet them for the first time and get to know them a little. (FORMAL)
I first made his ~ in the early 1960s...
PHRASE: V inflects