Discontinuity may refer to:
- Discontinuity (casting), an interruption in the normal physical structure or configuration of an article
- Discontinuity (geotechnical engineering), a plane or surface marking a change in physical or chemical properties in a soil or rock mass
- Discontinuity (mathematics), a property of a mathematical function
- Discontinuity (linguistics), a property of tree structures in theoretical linguistics
- Discontinuity (Postmodernism), a conception of history as espoused by the philosopher Michel Foucault.
- Revolutionary breach of legal continuity
- A break in continuity (fiction), in literature
- Fracture (geology), discontinuity in rocks
- Discontinuity (transmission lines), a step in impedance causing reflections