Definition of pitch:

part of speech: verb

To fling or throw; to plant or set, as a camp or tent; to throw, as at a point; to cast forward; to ascertain by trial the key- note of a piece of music; to fix choice; to rise and fall, as a boat or ship on the water; to come to rest from flight; to plunge or fall headlong.

part of speech: verb

To smear or cover with pitch; to blacken; to obscure.

part of speech: noun

The thick black substance obtained by boiling down common tar; the resinous juice of the pine or fir- tree.