Definitions of peer:

• noun:   a person who is of equal standing with another in a group
• noun:   a nobleman (duke or marquis or earl or viscount or baron) who is a member of the British peerage
• verb:   look searchingly

  Example: "We peered into the back of the shop to see whether a salesman was around"

• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #8895)