[ih-mur-zhuh n, -shuh n]


an act or instance of immersing.
state of being immersed.
state of being deeply engaged or involved; absorption.
baptism in which the whole body of the person is submerged in the water.
Also called ingress. Astronomy. the entrance of a heavenly body into an eclipse by another body, an occultation, or a transit.Compare emersion(def 1).


concentrating on one course of instruction, subject, or project to the exclusion of all others for several days or weeks; intensive: an immersion course in conversational French.

Nearby words

  1. immensurable,
  2. immerge,
  3. immerse,
  4. immersed,
  5. immerser,
  6. immersion foot,
  7. immersion heater,
  8. immersion objective,
  9. immersionism,
  10. immersive

Origin of immersion

1425–75; late Middle English < Late Latin immersiōn- (stem of immersiō) a dipping in. See immerse, -ion

Related formsnon·im·mer·sion, noun

Can be confusedemersion immersion Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for immersion

British Dictionary definitions for immersion



a form of baptism in which part or the whole of a person's body is submerged in the water
Also: ingress astronomy the disappearance of a celestial body prior to an eclipse or occultation
the act of immersing or state of being immersed
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

Word Origin and History for immersion



mid-15c., from Late Latin immersionem (nominative immersio), noun of action from past participle stem of immergere, from assimilated form of in- "into, in, on, upon" (see in- (2)) + Latin mergere "plunge, dip" (see merge). Meaning "absorption in some interest or situation" is from 1640s. As a method of teaching a foreign language, it is from 1965, trademarked by the Berlitz company.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for immersion


[ĭ-mûrzhən, -shən]


The placing of a body under water or other liquid.
The use of a fluid on a microscope slide in order to exclude air from between the glass slide and the bottom lens.
Related formsim•merse (ĭ-mûrs) v.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.