extension

B2 · Upper Intermediate Countable noun

n. a new room or part that is added to an existing building.

n. a structural addition to an existing building that increases its total floor area or volume.

“They are building a kitchen extension to make more room for the family.”

“The planning committee approved the rear extension on the condition that the materials matched the original Victorian brickwork.”

B2 · Upper Intermediate Countable noun

n. a short set of numbers used to reach a specific person in a large office.

n. a subsidiary telephone line connected to a main switchboard, identified by a specific numerical code.

“If you need to speak to the manager, call the main office and ask for extension 402.”

“The directory lists the direct extensions for every department head, allowing clients to bypass the automated reception menu.”

B2 · Upper Intermediate Countable noun Computing

n. a small program you add to a web browser or app to give it new features.

n. a software module that adds specific features or functionality to an existing computer program or browser.

“I installed a browser extension that blocks annoying advertisements.”

“The developer released a security extension designed to encrypt sensitive data before it is uploaded to the cloud storage service.”

B2 · Upper Intermediate Countable noun

n. extra pieces of hair or material added to your own to make them look longer.

n. artificial lengths of hair or synthetic material attached to a person's natural hair or nails for aesthetic purposes.

“She spent three hours at the salon getting hair extensions for the wedding.”

“The stylist recommended high-quality silk extensions to ensure the final look appeared natural and blended seamlessly with the client's own hair.”

C1 · Advanced Uncountable noun Medicine Technical

n. the act of straightening a part of your body, like an arm or a leg.

n. the movement by which the two ends of any jointed part are drawn away from each other; the straightening of a limb.

“The physical therapist told him to focus on the full extension of his knee.”

“Post-operative recovery protocols emphasize the gradual restoration of full extension in the elbow joint to prevent permanent stiffness.”

B2 · Upper Intermediate Countable noun Computing

n. the letters at the end of a computer file name that show what kind of file it is.

n. a suffix consisting of a period and several characters at the end of a filename, indicating the file format.

“Make sure you save the document with a .pdf extension so everyone can open it.”

“The operating system uses the file extension to determine which application should be launched by default when the user double-clicks the icon.”