The term pitch can have several meanings depending on its context.
1) In a general sense, it refers to an idea or proposal presented for consideration. For example, someone might say “I made my pitch” when they’ve explained their concept or suggestion to another person.
2) It is also used in the field of music to describe a particular note or tone. A musical pitch can be high or low and it refers to how high or low the sound is produced by an instrument or vocalist.
3) In sports, particularly baseball, "pitch" means throwing a ball with maximum force towards home plate in order to get a batter out. The term also applies to the act of pitching itself - delivering the ball to the catcher.