Pronunciation: (kach'ur),[key] —n. 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.