Extension
Part of speech: noun
Definition: The act of extending or the state of being extended; a stretching out; enlargement in breadth or continuation of length; increase; augmentation; expansion. That property of a body by which it occupies a portion of space (or time, e.g. "spatiotemporal extension") Capacity of a concept or general term to include a greater or smaller number of objects; -- correlative of intension. A written engagement on the part of a creditor, allowing a debtor further time to pay a debt. The operation of stretching a broken bone so as to bring the fragments into the same straight line. An exercise in which an arm or leg is straightened against resistance. A simple offensive action, consisting of extending the weapon arm forward. A numerical code used to specify a specific telephone in a telecommunication network. A file extension.
Example sentence: I invented the cordless extension cord.
Annex
Part of speech: verb
Definition: To add something to another, to incorporate into.
Part of speech: noun
Definition: An addition, an extension.An appendix.An addition or extension to a building.