Displacement (geometry), is the difference between the final and initial position of a point trajectory (for instance, the center of mass of a moving object). The actual path covered to reach the final position is irrelevant.
Particle displacement, a measurement of distance of the movement of a particle in a medium as it transmits a wave (represented in mathematics by the lower-case Greek letter ξ)
Displacement field (mechanics), an assignment of displacement vectors for all points in a body that is displaced from one state to another
Displacement has several meanings related to ships and boats
Displacement hull, where the moving hull's weight is supported by buoyancy alone and it must displace water from its path rather than planing on the water's surface
Displacement speed, a rule of thumb for non planing watercraft to estimate their theoretical maximum speed
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