n The distance between evenly spaced objects, e.g. the teeth of a saw, the turns of a screw thread, or letters in a monospace font.
n (nautical) The measure of extent to which a nautical vessel rotates on its athwartships axis, causing its bow and stern to go up and down. Compare with roll, yaw and heave.
n (climbing) A section of a climb or rock face; specifically, the climbing distance between belays or stances.
v (ambitransitive|aviation|or|nautical) To move so that the front of an aircraft or ship goes alternatively up and down.
n (music) In an a cappella group, the singer responsible for singing a note for the other members to tune themselves by.