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extension

nouncommon in dialogue

  • //ɪkˈstɛnʃən//
  • //ɛkˈstɛnʃən//

The act of extending; a stretching out; enlargement in length, breadth, or time; an increase.

noun

  1. 1

    The act of extending; a stretching out; enlargement in length, breadth, or time; an increase.

    Next month the house is undergoing an extension.

    Due to the unforeseen circumstances, you are allowed an extension of two weeks to complete the task.

    "Keep off Conductor Rails" said red-painted notices at the platform ends, for third-rails were laid in many places even where electric trains never normally ran, and there had been many rumours of impending electrification of the Wirral, as a natural extension of the Mersey system, a quarter of a century before the change was actually made.

  2. 2

    The state of being extended.

    For station is properly no rest, but one kind of motion, relating unto that which physicians (from Galen) do name extensive or tonical; that is, an extension of the muscles and organs of motion, maintaining the body at length, or in its proper figure.

  3. 3

    That property of a body by which it occupies a portion of space (or time, e.g. "spatiotemporal extension").

  4. 4

    A short exact sequence 1→H→E→G→1, or the group E therein.

  5. 5

    A short exact sequence 0→B→E→A→0, or the object E therein.

  6. 6

    A part of a building that has been added onto the original.

  7. 7

    An outgrowth; a part of something that extends its capabilities.

    Parents who treat their children as an extension of themselves

    My research is an extension of the work of my mentor.

    In smaller communities, the public schools are virtual extensions of each town's chief religion — "educating" kids to all the prejudices of that belief.

  8. 8

    Capacity of a concept or general term to include a greater or smaller number of objects; — correlative of intension.

    Perversely, we love John Wick himself. That lethal, bereaved assassin is a good bad guy for our times, the natural extension of Tony Soprano, Walter White and all the other heroic antiheroes the culture has embraced.

  9. 9

    Semantic widening, broadening of meaning.

  10. 10

    A written engagement on the part of a creditor, allowing a debtor further time to pay a debt.

  11. 11

    The operation of stretching a broken bone so as to bring the fragments into the same straight line.

  12. 12

    An exercise in which an arm or leg is straightened against resistance.

  13. 13

    A simple offensive action, consisting of extending the weapon arm forward.

  14. 14

    A numerical code used to indicate a specific telephone in a telecommunication network.

  15. 15

    An optional software component that adds functionality to an application.

    Near-synonym: plugin

    a browser extension

  16. 16

    The set of tuples of values that, used as arguments, satisfy the predicate.

  17. 17

    A kind of derivative morpheme applied to verbs in Bantu languages.

  18. 18

    The ideal in the codomain generated by the image of the given ideal under the given homomorphism.

  19. 19

    University programs that are targeted at the broader (usually adults) community whose participants are not full-time enrolled students.

  20. 20

    Variant of file extensionEllipsis of file extension.

    Files with the .txt extension usually contain text.

    If you plan to plot data with error bars, you must name them with an. ERR extension. Failure to do so will crash the system, and you will lose your precious work.

  21. 21

    Variant of hair extensionClipping of hair extension, nail extension, or eyelash extension.

Etymology

From Middle English extensioun, from Old French estension, from Latin extensiō, extensiōnem.

Forms

plural
extensions
The neighbouring pagesAlphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.

Lexical content from Wiktionary, under CC BY-SA 4.0 · Source entry · Data version 2026-08-23

Rank among the words of the OpenSubtitles 2018 corpus — film and television subtitles, so spoken rather than written usage (CC BY-SA 3.0).