1. (especially in compounds) a thing or person that removes or reduces pain, feelings of worry or unhappiness, or a problem
   • ● a pain reliever (= a drug used to reduce or remove pain)
   • ● Exercise can be a great stress reliever.

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2. (also relief pitcher)
   (in baseball) a pitcher (= the player who throws the ball) who enters the game in place of the previous pitcher
   • ● Wilson began his major-league career as a reliever.
   • ● The manager often has relievers warming up when the game starts.
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[TahlilGaran] English Dictionary ▲