To rest means to relax or take time off; see leisure or nap.

Rest or REST may also refer to:

• Rest (album), a 2008 album by Gregor Samsa
• Rest (music), a pause in a piece of music
• Rest (physics), the relation between two observers
• RE1-silencing transcription factor, a human gene
• Representational State Transfer (REST or RESTful), a style of software architecture for distributed hypermedia systems
• Rest (comic), a comic book produced by Milo Ventimiglia, Divide Pictures and Devil's Due Publishing
• Restricted Environmental Stimulation Technique, a sensory deprivation technique
• reStructuredText, a lightweight markup language
• In functional groups and side chains (chemistry), a rest is a variable part of a molecule attached to a given core structure
• "Rest" (cue sports), a term for any of a set of mechanical bridges
• In jousting, a rest is a cup near the armpit on the side of medieval armour
• Bank reserves (terminology of the Bank of England)