Peeress
/ˈpɪrəs/
Definition 1 of 1
Pro Tip 1/3Gender Specific
The term 'peeress' is exclusively used for females in the context of British nobility. 
Upon her marriage to the earl, she became a peeress.
Pro Tip 2/3Noble Ranks
'Peeress' refers to various noble ranks such as duchesses, countesses, and baronesses. 
The peeress attended the royal banquet with other members of high society.
Pro Tip 3/3Hereditary or Earned
Peeresses sometimes inherit their title, but it can also be granted for special achievements. 
She didn't inherit the title; she was named a peeress after her extensive diplomatic service.