'Reliever' definitions:

Definition of 'reliever'

(from WordNet)
noun
Someone who takes the place of another (as when things get dangerous or difficult); "the star had a stand-in for dangerous scenes"; "we need extra employees for summer fill-ins" [syn: stand-in, substitute, relief, reliever, backup, backup man, fill-in]
noun
A person who reduces the intensity (e.g., of fears) and calms and pacifies; "a reliever of anxiety"; "an allayer of fears" [syn: reliever, allayer, comforter]
noun
A pitcher who does not start the game [syn: reliever, relief pitcher, fireman]

Definition of 'Reliever'

From: GCIDE
  • Reliever \Re*liev"er\ (-?r), n. One who, or that which, relieves. [1913 Webster]