1. a person or thing that catches.
  2. Baseball. the player stationed behind home plate, whose chief duty is to catch pitches not hit by the batter.
  3. a member of an aerialist team, as in a circus, who hangs head down from a trapeze and catches another member who has completed a jump or somersault through the air.
  4. Metalworking. a person who feeds metal rods through a looping mill.
  5. Electronics. catcher resonator.See under Klystron.


  1. a person or thing that catches, esp in a game or sport
  2. baseball a fielder who stands behind home plate and catches pitched balls not hit by the batter

“one who catches,” in any sense, mid-14c., agent noun from catch (v.).

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