Dyke (normal International spelling) or Dike (normal American spelling) can mean several things:
- A dyke / dike is a long wall built to keep out the sea or enclose land.
- Dyke / Dike is another word for a ditch
- Dyke / Dike is a slang term for a lesbian.
- In geology, a dyke / dike is a long mass of minerals, usually an intrusion of igneous rocks, filling up rents or fissures in the original strata.
- Dike is the Greek goddess of moral justice.
- 99 Dike is an asteroid.
- A dyke / dike short for diagonal cutters. Often used in plural "Get me a pair of dikes".
