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The meaning of EXTENSION is the action of extending : state of being extended. How to use extension in a sentence.

EXTENSION definition: an act or instance of extending, lengthening, stretching out, or enlarging the scope of something. See examples of extension used in a sentence.

EXTENSION definition: 1. the fact of reaching, stretching, or continuing; the act of adding to something in order to make…. Learn more.

When it comes to the correct spelling between “extention” and “extension,” know that “extension” is the right one. “Extention” is a misspelling made so often that even native English speakers will write it …

An addition that increases the area, influence, operation, or contents of something: an extension for the vacuum cleaner; built a new extension onto the hospital wing.

Extension definition: The act of extending or the condition of being extended.

Jan 25, 2026 · extension (countable and uncountable, plural extensions) Next month the house is undergoing an extension. Due to the unforeseen circumstances, you are allowed an extension of two …

An extension is an extra period of time for which something lasts or is valid, usually as a result of official permission. He first entered the country on a six-month visa, and was given a further extension of six …