Definition of elongation in English:

Share this entry


Pronunciation: /ēˌlôNGˈɡāSH(ə)n/


1The lengthening of something.
Example sentences
  • Thus, the mechanical response in the adhesion geometry can be only partially estimated since adhesion induces strong elongations in the adhesive material.
  • To ensure that stressing was proceeding as expected, the testing agency measured the tendon elongations and compared them to the calculated elongations.
  • The lower maximum load used for calculation of graft elongations assured that values would be available for all specimens.
1.1A part of a line formed by lengthening; a continuation.
1.2The amount of extension of an object under stress, usually expressed as a percentage of the original length.
Example sentences
  • All structural metals have approximately the same ductility as measured by percentage elongation.
  • The relative amounts of elongation and spread cannot be calculated theoretically but they have been determined experimentally for mild steel.
  • Also ductility, as measured by percentage elongation, decreases.
1.3 Astronomy The angular separation of a planet from the sun or of a satellite from a planet, as seen by an observer.
Example sentences
  • Furthermore, any resonance with the Earth is illusory in that Mercury is not well placed for observations except during its brief greatest elongations near its aphelion.
  • The planet reaches greatest eastern elongation, 23.5 degrees from the Sun, on the 3rd.
  • On the 9th the planet is at greatest elongation from the Sun and sets around two hours after the Sun.


Late Middle English: from late Latin elongatio(n-), from elongare 'place at a distance' (see elongate).

For editors and proofreaders

Syllabification: e·lon·ga·tion

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.