Also found in: Dictionary, Thesaurus, Medical, Encyclopedia.
To form or become part of a pair. A noun or pronoun can come between "pair" and "up" if the verb is used transitively. OK, everyone pair up and come up with different ways you could apply what we talked about today to your work. We'll have to pair up the guests who didn't come with dates.
pair up (with someone)
to join with someone to make a pair. Sally decided to pair up with Jason for the dance contest. Sally and Jason paired up with each other.
1. To arrange some things or people in groups of two: The gym teacher paired up the students and started a badminton tournament. The organizer paired the volunteers up.
2. To form pairs or a pair: The dance students paired up and practiced waltzing. My best friend and I paired up when our class chose locker partners.