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rapid eye movement

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noun
  1. rapidly shifting, continuous movements of the eyes beneath closed lids during the stage of sleep characterized by dreaming.
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Origin of rapid eye movement

First recorded in 1915–20
Also called REM
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for rapid eye movement

rapid eye movement

noun
  1. movement of the eyeballs under closed eyelids during paradoxical sleep, which occurs while the sleeper is dreamingAbbreviation: REM
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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

rapid eye movement in Medicine

rapid eye movement

n.
  1. The rapid periodic jerky movement of the eyes during certain stages of the sleep cycle when dreaming takes place.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.