1.  catcher(n = noun.person) backstop - (baseball) the person who plays the position of catcher;
is a kind of infielder
Derived forms verb catch₂₇, verb catch₄

2.  catcher(n = noun.act) - the position on a baseball team of the player who is stationed behind home plate and who catches the balls that the pitcher throws; "a catcher needs a lot of protective equipment"; "a catcher plays behind the plate"
is a kind of position
is a member of baseball team
Derived form verb catch₄

1.  One who, or that which, catches. [1913 Webster]

2.  The player who stands behind the batsman to catch the ball. [1913 Webster]

catcher, n.
1 a person or thing that catches.
2 Baseball a fielder who stands behind the batter.

dog catcher, flack catcher, flak catcher, oyster catcher, pass catcher, torpedo catcher