1.
If you catch up with someone who is in front of you, you reach them by walking faster than they are walking.
I stopped and waited for her to catch up...
We caught up with the nuns.
PHRASAL VERB : V P , V P with n
2.
To catch up with someone means to reach the same standard, stage, or level that they have reached.
Most late developers will catch up with their friends...
John began the season better than me but I have fought to catch up...
During the evenings, the school is used by kids who want to catch up on English and mathematics.
PHRASAL VERB : V P with n , V P , V P on/in n
3.
If you catch up on an activity that you have not had much time to do recently, you spend time doing it.
I was catching up on a bit of reading.
PHRASAL VERB : V P on/with n
4.
If you catch up on friends who you have not seen for some time or on their lives, you talk to them and find out what has happened in their lives since you last talked together.
The ladies spent some time catching up on each other’s health and families...
She plans to return to Dublin to catch up with the relatives she has not seen since she married.
PHRASAL VERB : V P on n , V P with n
5.
If you are caught up in something, you are involved in it, usually unwillingly.
The people themselves weren’t part of the conflict; they were just caught up in it...
PHRASAL VERB : be V-ed P in n