REM


Meaning of REM in English

/ ˌɑːr iː ˈem; NAmE / abbreviation

rapid eye movement (describes a period of sleep during which you dream and your eyes make many small movements)

For more information see the Cultural Guide

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.