rem

1 of 2

noun (1)

ˈrem 

: the dosage of an ionizing radiation that will cause the same biological effect as one roentgen of X-ray or gamma-ray exposure

REM

2 of 2

noun (2)

ˈrem 

ˌär-ˌē-ˈem

: rapid eye movement

Examples of rem in a Sentence

Recent Examples on the Web

Noun

In April, more than 200 musicians, including Billie Eilish, REM, Stevie Wonder, signed an open letter organized by the Artists’ Rights Alliance to ask tech companies to stop devaluing music. —Jennifer Kite-Powell, Forbes.com, 28 Aug. 2025

Noun

In April, more than 200 musicians, including Billie Eilish, REM, Stevie Wonder, signed an open letter organized by the Artists’ Rights Alliance to ask tech companies to stop devaluing music. —Jennifer Kite-Powell, Forbes.com, 28 Aug. 2025

Word History

Etymology

Noun (1)

roentgen equivalent man

First Known Use

Noun (1)

1947, in the meaning defined above

Noun (2)

1957, in the meaning defined above

Phrases Containing rem

• ad rem
• in rem

Rhymes for rem

• clem
• em
• femme
• gem
• hem
• phlegm
• stem
• them
• atm
• chernozem
• diadem
• ibidem

Kids Definition

REM

noun

ˈrem 

: rapid eye movement

Medical Definition

rem

1 of 2 noun

ˈrem 

: the dosage of an ionizing radiation that will cause the same biological effect as one roentgen of X-ray or gamma-ray dosage compare rep

REM

2 of 2 noun

ˈrem 

: rapid eye movement