extension
Extension (noun) means an extra part added to something to make it larger or longer, or an extra period of time granted beyond an original deadline. Example: “They built a single-storey extension at the back of the house.”
How to use extension
Learner’s notesIn plain EnglishSomething added on to make a thing bigger, longer or more useful.
You 'grant' or 'request' an extension of time, and you 'install' a software extension.
Trace the full origin ↓Fill the gap
Can you complete this real example?
They built a single-storey _____ at the back of the house.
Etymology
From Latin extensio, from extendere ('to stretch out'), from ex ('out') plus tendere ('to stretch').
Synonyms
View more →Related words
Rhymes for extension
Frequently asked questions
What is the difference between an extension and a plug-in?
In browsers the terms now overlap heavily. Historically a plug-in was separate software that let the browser handle a media type it could not read on its own, while an extension is written for the browser itself to add features to the interface. Modern browsers have retired plug-ins and use 'extension' for almost everything.
What is a file extension?
It is the suffix after the final dot in a filename, such as .pdf or .jpg, which tells the operating system what kind of file it is and which program should open it. Changing it does not convert the file; it only changes what the system expects.
How do you ask for a deadline extension?
Ask early, before the deadline passes, state plainly why you need it, and propose a specific new date rather than an open-ended delay. Confirming it in writing protects both sides.
What is the meaning of extension?
"extension" (noun) means an extra part added to something to make it larger or longer, or an extra period of time granted beyond an original deadline.