catch up (1)
Meaning: If you catch up with someone who is ahead of you, you go faster than them until you reach them.
- catch up Salma got behind her classmates because she was sick for a month, but she did extra work after school and she soon caught up.
- catch up with sb Mark was still about three metres behind, so he swam as fast as he could to catch up with the leader.
- catch sb/sth up If they left half an hour before us, we can't possibly catch them up. They'll be too far ahead.
If you want to catch up with a car that's ahead of you, you'll have to