What does the term "pitch" refer to on a plane?

In aviation, "pitch" specifically refers to the angle at which the aircraft's nose moves up or down relative to the horizon, which is closely related to the aircraft's attitude in flight. However, in this context, the correct understanding involves a different aspect related to seating configuration on a plane. The term refers to the measurement of space allocated between rows of seats, which affects passenger comfort and legroom. This measurement is critical for airlines when configuring their cabins to maximize both comfort for passengers and capacity for revenue. This context highlights the importance of pitch in the seating layout, distinguishing it from other aviation-related definitions that refer to movement or distance in different operational contexts.