Meaning of “pair” - Learner’s Dictionary

pair

noun [ C ] uk us /peər/
TWO THINGS

A2 two things that look the same and that are used together:

a pair of socks/shoes
TWO PARTS

A2 something that is made of two parts that are joined together:

a pair of scissors
a new pair of jeans/trousers
TWO PEOPLE

A1 two people who are doing something together:

For the next exercise, you'll need to work in pairs.

(Definition of “pair” from the Cambridge Learner’s Dictionary © Cambridge University Press)