Meaning of RAD in English

RAD

/ ræd; NAmE / adjective , noun

■ adjective

( old-fashioned slang , especially NAmE ) very good

■ noun

( physics ) a unit for measuring the effect of radiation

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WORD ORIGIN

1980s: probably an abbreviation of radical .

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