Sear may refer to:
- Sear (firearm), part of the trigger mechanism on a firearm
- Seir (demon), a Prince of Hell; also spelled Sear
- Searing, a cooking technique which quickly cooks the exterior of a food item
- Surfactant Enhanced Aquifer Remediation, typically performed with Hydrocarbon Mitigating Surfactants in soil remediation
- Sear, a client for the WorldForge MMORPG framework
- sear.ch, a Swiss search engine
- SEAr, electrophilic aromatic substitution, a common reaction in organic chemistry
- SEAR, Siemens Engineering und Anlagenerrichtung Rostock GmbH
- SEAR (mathematics), Sets, Elements, And Relations, a structural set theory in mathematical logic.