What is mean of meet up?

informal. : to come together with (someone) : to go to a place to be with (someone) Ill meet up with you later. They met up with each other for drinks.

What is it called when you meet someone?

acquaintance Add to list Share. An acquaintance is someone you know a little about, but theyre not your best friend or anything. An acquaintance is less intimate than a friend, like a person in your class whose name you know, but thats it. When you “make the acquaintance of” someone, you meet them for the first time.