1 two things the same
ADJ. matching a matching pair of vases | identical
PREP. in a/the ~ Answer one question in each pair. | in ~s These candlesticks only come in pairs. | ~ of a pair of shoes
PHRASES one of a pair one of a pair of crystal vases
2 people who are connected
ADJ. inseparable | good | happy (= a newly married couple) | odd They make an odd pair.
VERB + PAIR match The pair were matched for age. | make I thought they would make a good pair so I arranged for them to meet.
PREP. in a/the ~ The students worked in pairs.
3 male and female animal
PAIR + VERB breed, mate
PREP. ~ of a pair of swans nesting by the river