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| | Extension - Wikipedia, the free encyclopedia |
 | | In general semantics, extension is a process that, as in this mathematical example, starts with unique individuals, and gives them unique names, e.g., I, II, III, etc., or 1, 2, 3, etc. The next step if needed generalizes or passes beyond extension to infinite-valued higher-order abstractions like 'numbers', and so on. |
 | | In physiology, extension is one of the movements of a joint such as the knee. |
 | | Hair extensions are strands of human hair placed onto a persons hair in order to elongate or thicken existing hair. |
| en.wikipedia.org /wiki/Extension (376 words) |
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