The term dreadnought may refer to:
- Dreadnought, a type of starship
- Cardassian ATR-4107, a Cardassian weapon nicknamed the "Dreadnought"
- "Dreadnought", a Star Trek: Voyager episode
- Dreadnought!, a TOS novel by Diane Carey
- Dreadnought class, a 23rd century starship class
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