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extension

Meaning in simple English

US /ɪkˈstɛnʃən/ · UK /ɪkˈstenʃən/

extension means: An extra part or period of time added to make something larger or last longer.

noun

EXTRA PART TIMEB1

An extra part or period of time added to make something larger or last longer.

  • We built an extension last year.
  • The teacher gave me a week's extension.
  • She removed her hair extensions before swimming.

How to use it: an extension to something (They built an extension to their house.); an extension of something (She requested an extension of the deadline.)

Similar words: addition

Common phrases: house extension, hair extension, deadline extension, request an extension

FILE ENDINGB1

Letters after the last dot in a computer document’s name that show its type.

  • The file extension is pdf.
  • Change the extension only if you know the file type.
  • Some programs hide file extensions.

Similar words: file extension, filename extension

Common phrases: file extension, pdf extension

MAKING LONGERB2

The process or state of making something longer or allowing it to reach further.

  • Full extension of the arm caused pain.
  • The project involves the extension of the railway.
  • Repeated extensions of the knee strengthened the muscle.

How to use it: the extension of something (The extension of the railway took several years.)

Similar words: lengthening, stretching

Opposites: shortening, contraction

Common phrases: full extension, extension of something, gradual extension

STRAIGHTENING LIMBC1

The movement of an arm, leg, or finger into a straight position, sometimes against a weight.

  • Full extension of the knee was painful.
  • She does leg extensions at the gym.
  • The therapist checked extension in both elbows.

Similar words: straightening

Opposites: flexion

Common phrases: leg extension, knee extension, full extension

OCCUPIED SPACEC2

The amount of space, or sometimes time, that something takes up.

  • Every physical object has extension in space.
  • The philosopher discussed the extension of matter.
  • The theory considers both spatial and temporal extension.

Similar words: extent

Common phrases: spatial extension, temporal extension, extension in space

BONE ALIGNMENTC2

Pulling the ends of a broken bone apart to bring the pieces into a straight line.

  • The doctor used extension to align the broken bone.
  • Extension kept the bone fragments in line.
  • Weights provided gentle extension during treatment.

Similar words: traction

Common phrases: bone extension, extension treatment

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