v. 1. To make a pair of; match. When she finished the mending, she paired up the socks. 2. To form a pair; to be or become one of a pair. Not all the socks would pair up. Joe paired up with Charlie to work on the lesson.
PAIR UP
Meaning of PAIR UP in English
American idioms English vocabulary. Английский словарь американских идиом. 2012