Definition of "Pitcher" :

noun: the position on a baseball team of the player who throws the ball for a batter to try to hit

"He has played every position except pitcher."

noun: an open vessel with a handle and a spout for pouring

noun: (baseball) the person who does the pitching

"Our pitcher has a sore arm."

noun: (botany) a leaf that that is modified in such a way as to resemble a pitcher or ewer

noun: the quantity contained in a pitcher