Displacement may refer to:
Mathematics and physics
- 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
- Electric displacement field, as appears in Maxwell's equations
- Wien's displacement law, a relation concerning the spectral distribution of blackbody radiation
- Angular displacement, a change in orientation of a rigid body, the amount of rotation about a fixed axis.
- Engine displacement, the total volume of air/fuel mixture an engine can draw in during one complete engine cycle
- Displacement (fluid), an object immersed in a fluid pushes the fluid out of the way
- Positive displacement meter, a pump or flow meter which processes a definite fluid volume per revolution
- 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
- Displacement (ship), several related measurements of a ship's weight
- Insulation displacement connector, a type of electrical connector
- Displacement mapping, a technique in 3D computer graphics
- Single displacement reaction, a chemical reaction concerning the exchange of ions
- Double displacement reaction, a chemical reaction concerning the exchange of ions
- Radioactive displacement law of Fajans and Soddy, elements/isotopes created during radioactive decay
- Earth Crustal Displacement, an aspect of the Pole shift hypothesis
- Displacement (orthopedic surgery), change in alignment of the fracture fragments
- Displacement (linguistics), the ability of humans (and possibly some animals) to communicate ideas that are remote in time and/or space
- Forced displacement, by persecution or violence
- Displacement (psychology), a sub-conscious defense mechanism
- Displacement (parapsychology), a statistical or qualitative correspondence between targets and responses.
- Development-induced displacement, the displacement of population for economic development
- Displacement may occur during gentrification.
- Displacement (fencing), a movement that avoids or dodges an attack