pair up phrasal verb ( see also ↑ pair )
1 . British English to become friends and start to have a relationship:
We learned later that he and Tanya had paired up.
2 . to work together to do something or to put two people together to do something:
They first paired up in the screen adaptation of ‘Grease’.
pair somebody ↔ up
They have paired up writers and artists, and commissioned linked works.
3 . if animals pair up, they come together in order to ↑ breed