Meaning of “meet up” - Learner’s Dictionary

meet up

phrasal verb with meet uk us /miːt/ verb (past tense and past participle met /met/)
MEET SOMEONE

to meet another person in order to do something together:

I met up with a few friends yesterday.
ROADS/PATHS JOIN

If roads or paths meet up, they join at a particular place:

This path meets up with the main road.

(Definition of “meet up” from the Cambridge Learner’s Dictionary © Cambridge University Press)