Definition of "rem" in English

noun

1. (often capitalized) Initialism of rapid eye movement, a sleep state.

noun

1. A non-SI unit of measure for radiation dose, measured as equivalent dose, effective dose, or committed dose, from one roentgen of X-rays or gamma rays.

noun

1. (computing) A remark; a programming language statement used for documentation (in BASIC for example); also used in DOS batch files.

adjective

1. (knitting) Remaining.

noun

1. (web design) A unit relative to the declared font size of the root element in an HTML document.