extension >> ɪkˈstɛnʃ(ə)n
Definition: [noun] a part that is added to something to enlarge or prolong it.
Example: the railway's southern extension
Definition: [noun] a length of electric cable which permits the use of appliances at some distance from a fixed socket.
Definition: [noun] a subsidiary telephone on the same line as the main one.
Example: you can listen on the extension in the bedroom
Definition: [noun] the action of moving a limb from a bent to a straight position.
Example: seizures with sudden rigid extension of the limbs
Definition: [noun] denoting instruction by a university or college arranged for people who are not full-time students.
Example: a postgraduate extension course
Definition: [noun] the range of a term or concept as measured by the objects which it denotes or contains.
Definition: [noun] the property of occupying space.
Example: nature, for Descartes, was pure extension in space