Extension
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Look up extension in Wiktionary, the free dictionary.
Extension may refer to:
- Extension (kinesiology), a movement of a joint in which one part of the body is moved away from another.
- Extension (metaphysics), the property of taking up space
- Extension (semantics), the set of things to which a property applied
- Extension (mathematics); an extension of some structure is another structure which contains the original structure
- Extension (geology)
- Extension (telephone), an internal telephone line attached to a PBX or Centrex system
- Extension (computing), a computer program that is not useful in its own right but designed to be incorporated in another piece of software
- Tension (physics)
- System Extension, a particular type of this software on the classic Mac OS
- Extension (Mozilla), this type of software for Firefox and other Mozilla projects
- Extension (community development), the building of community capacity by outsiders, for instance, agricultural extension
- Extension (cheerleading), a stunt in which a flyer is held in the air by the bases' fully extended arms
- Extension, the classical name for the Mc1r gene.
- Extension (music), a set of notes that fit outside the standard range
- Extension, BC is a small former coal-mining village near Nanaimo, BC, Canada
- Enamel extension in dentistry
- Extension cable
- Extensive property, in physics, a property which depends on the system size or the amount of material in the system
- Extension school, a school for continuing education
- Filename extension, a suffix to the name of a computer file applied to show its format
- Hair extensions, strands of hair added to supplement a person's existing hair
- Eyelash extensions
- Extensions the 1979 album by The Manhattan Transfer

