A device used in security systems that can alert the user of the presence of a moving object.

(astronomy, celestial mechanics) An angle of 𝜏 (radians) divided by the orbital period (of a celestial body in an elliptic orbit).

Motion given by inherent powers, without external impulse.

The distance (linear or angular) that a movable object may normally travel while properly attached to another. / (bodybuilding) The distance the relevant body parts travel during an exercise.

The rhythmic fluctuation of the flow of blood in the capillaries. / (film) A combination of a timelapse, hyperlapse, and regular cinematographic shots.

(engineering) The difference between the motion of a driver and that of a follower, due to the yielding of parts or looseness of joints.

plural of range of motion

Alternative form of it ain't the meat, it's the motion (size doesn't matter as much as technique)

plural of motion detector

(American football) A single player on offense (always a backfielder) who is moving backwards or parallel to the line of scrimmage at the snap.