There are multiple definitions - click on the translation that matches your context.

英国上议院议员

名词

neolog

peer

noun

Definitions of peer

English

(UK) a member of the House of Lords

About 130 peers requested to speak in a debate that lasted for around 10 hours.

English

if someone is your peer then they are either the same age as you, or they same social status as you, or they have the same abilities as you

The policy is aimed at closing the achievement gap between disadvantaged pupils and their peers.