bio·​re·​gion | \ˈbī-ō-ˌrē-jən \

Definition of bioregion 

: a region whose limits are naturally defined by topographic and biological features (such as mountain ranges and ecosystems)

Keep scrolling for more

Other Words from bioregion

bioregional \ˌbī-​ō-​ˈrēj-​nəl, -​ˈrē-​jə-​nᵊl \ adjective

Examples of bioregion in a Sentence

Recent Examples on the Web

PCBs have been found the world over—from the bed of the Hudson River to the fat of polar bears roaming the high Arctic—but never before in the creatures of the extreme deep, a bioregion about which science knows relatively little. Rebecca Altman, The Atlantic, "How the Benzene Tree Polluted the World," 4 Oct. 2017 Saint Francis (San Francisco) – the namesake of our bioregion – is the patron saint of animals and the environment. Peter Drekmeier, The Mercury News, "Commentary: California can revive San Francisco Bay-Delta estuary," 16 Feb. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'bioregion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of bioregion

1945, in the meaning defined above

Keep scrolling for more

Learn More about bioregion

Statistics for bioregion

Look-up Popularity

Time Traveler for bioregion

The first known use of bioregion was in 1945

See more words from the same year

Comments on bioregion

What made you want to look up bioregion? Please tell us where you read or heard it (including the quote, if possible).


to enclose within walls

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!