[ ih-mur-zhuh n, -shuh n ]
/ ɪˈmɜr ʒən, -ʃən /


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.

Origin of immersion

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

Related forms

non·im·mer·sion, noun

Can be confused

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

Examples from the Web for immersion

British Dictionary definitions for immersion


/ (ɪˈmɜːʃən) /


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

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 forms

im•merse (ĭ-mûrs) v.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.