Definition of "extension" in English

noun

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.

2. The state of being extended.

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

4. (mathematics, group theory, of a group G by a group H) A short exact sequence 1→H→E→G→1, or the group E therein.

5. (mathematics, homological algebra, of an object A by an object B in an abelian category) A short exact sequence 0→B→E→A→0, or the object E therein.

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

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.

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

9. (linguistics, semantics) semantic widening, broadening of meaning

10. (banking, finance) A written engagement on the part of a creditor, allowing a debtor further time to pay a debt.

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

12. (weightlifting) An exercise in which an arm or leg is straightened against resistance.

13. (fencing) A simple offensive action, consisting of extending the weapon arm forward.

14. (telecommunications) A numerical code used to indicate a specific telephone in a telecommunication network.

15. (computing) Ellipsis of file extension.

    • Files with the .txt extension usually contain text.

16. (computing) An optional software component that adds functionality to an application.

    • a browser extension

17. (logic) The set of tuples of values that, used as arguments, satisfy the predicate.

18. (grammar) A kind of derivative morpheme applied to verbs in Bantu languages.

19. (ring theory, of an ideal in the domain of a ring homomorphism) The ideal in the codomain generated by the image of the given ideal under the given homomorphism.

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