pitch /piCH, /
— n

1. the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone.
2. the steepness of a slope, especially of a roof.
3. the height to which a hawk soars before swooping on its prey.
4. Baseball a legal delivery of the ball by the pitcher.
5. a form of words used when trying to persuade someone to buy or accept something.

source: Oxford English dictionary