Something that is added to make something longer, larger, or last for more time. It can also mean the act of stretching a part of the body, or a phone number that connects to a specific line inside a larger system.
From Latin *extensio* ‘a stretching out’, from *extendere* ‘to stretch out’. It focuses on the result or process of stretching.
An extension is like an extra limb for whatever you already have—extra time, extra space, extra reach. Even a phone extension is just your main number with a little ‘arm’ that reaches a particular person.
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