[ yoo-nuh-fawr-mi-tair-ee-uh n ]
/ ˌyu nəˌfɔr mɪˈtɛər i ən /


supporting, conforming to, or derived from a theory or doctrine about uniformity, especially on the subject of geology.
Geology. of or relating to the thesis that processes that operated in the remote geological past are not different from those observed now.


a person who accepts or supports a uniformitarian theory.

Nearby words

  1. uniform,
  2. uniform business rate,
  3. uniform crime report,
  4. uniform resource locator,
  5. uniformed,
  6. uniformitarianism,
  7. uniformity,
  8. uniformize,
  9. unify,
  10. uniglandular

Origin of uniformitarian

First recorded in 1830–40; uniformit(y) + -arian

Related formsu·ni·form·i·tar·i·an·ism, noun

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for uniformitarian

British Dictionary definitions for uniformitarian


/ (ˌjuːnɪˌfɔːmɪˈtɛərɪən) /


of or relating to uniformitarianism
of, characterized by, or conforming to uniformity


a supporter of a theory of uniformity or of uniformitarianism
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012