Illegal Motion: On offense, a player may be in motion but cannot be going forward at the time of the snap (except in Arena football where one player is allowed to do so), and a lineman must be set for one second before the snap. Otherwise it is an illegal motion.

 

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Illegal Motion: On offense, a player may be in motion but cannot be going forward at the time of the snap (except in Arena football where one player is allowed to do so), and a lineman must be set for one s . . . View Full Definition

Mean Motion: Average motion or rate of travel within a specified time period.

Market Promotion Program (MPP): An export promotion program authorized by the FACT Act of 1990 that replaced the Targeted Export Assistance (TEA) program authorized by the Food Security Act of 1985. The MPP was renamed the . . . View Full Definition

Motion: The movement of offensive players prior to the snap.

Motion capture: A technology used to record the movements of real actors so that their in-game counterparts appear to move in a more realistic fashion.

Man-In-Motion: A player on offense who is moving backwards or parallel to the line of scrimmage just before the snap. In American football, only one offensive player can be in motion at a time, cannot be m . . . View Full Definition

Level Of No Motion: A level (or layer) at which it is assumed that an isobaric surface coincides with a geopotential surface. A level (or layer) at which there is no horizontal pressure gradient force.

Illegal Formation: On offense, there must be exactly seven players lined up on the line of scrimmage for at least one count before the ball is snapped. If not, then it is an illegal formation.

Illegal Immigrant-Alien: An individual who is not a U.S. citizen and who has entered the United States without proper documentation and without complying with legally required U.S. immigration and naturalization procedures.

Illegal Shift: On offense, only one person is allowed to be in motion at the snap. If not, it is an illegal shift.