A person who is equal to another in abilities, qualifications, age, background, and social status.
She found it easy to relate to her peers at the new school.
A member of the nobility in Britain or Ireland, comprising the ranks of duke, marquess, earl, viscount, and baron.
The peer was invited to the royal banquet.
In computer networking, a device or program that has the same capabilities and responsibilities as another device or program on the same network level.
Each peer in the network can serve files directly to the others.