Share this entry

orogen Syllabification: or·o·gen
Pronunciation: /ˈôrəˌjen/ /-jən/

Definition of orogen in English:


A belt of the earth’s crust involved in the formation of mountains.
Example sentences
  • These collision zones are known as orogenic belts, and the mountains are referred to as orogens.
  • The Delamerian Orogen is a compressional orogen developed by westward vergent folds and thrust faults.
  • Several features of the mountain belt are atypical when compared with other Palaeozoic orogens such as the Appalachians, Caledonides and Variscides.


1920s: from Greek oros 'mountain' + -gen.

Definition of orogen in:

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.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day haughty
Pronunciation: ˈhɔːti
arrogantly superior and disdainful