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extension

Transitive Verb[C/U] Both
pl: extensions

This word carries a sense of stretching or expanding existing boundaries rather than creating something entirely new. It implies a continuation of an original state, whether that be a period of time, a physical structure, or a digital tool. It is generally neutral but often carries a positive connotation of flexibility or added value. In professional environments, the term is heavily associated with grace periods and deadlines, evoking a feeling of relief or temporary reprieve. In technical contexts, it shifts toward modularity, where an extension is a plug-in that enhances a core system without altering the base architecture.

Countable when referring to a specific addition, such as a home extension or a phone extension. Uncountable when referring to the general act of lengthening something, like the extension of a deadline.

Meanings

Noun
[something]

The act of making something longer or larger.

"The company requested an extension of the deadline."

Noun
[something]

An additional part added to a building to increase its size.

"They built a small extension to the back of the house."

Noun
[something]

A supplementary device or software add-on that provides extra functionality.

"I installed a browser extension to block ads."

Noun
[something]

A secondary telephone line connected to a main line.

"Please transfer the call to extension 402."

Transitive Verb
[someone][something]

To make something longer or larger.

"The contractor will extension the driveway next week."

Last Updated: May 27, 2026Report an Error