blue adjective Meaning in the Cambridge Learner’s Dictionary
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Meaning of “blue” - Learner’s Dictionary

blue

adjective
 
 
/bluː/
COLOUR A1 being the same colour as the sky when there are no clouds: a dark blue jacket Common coloursLess common colours
SAD informal sadFeeling sad and unhappy
SEX about sex: a blue joke/movie →  See also black and blue , once in a blue moon Relating to sex and sexual desireRude and cheeky
(Definition of blue adjective from the Cambridge Learner’s Dictionary © Cambridge University Press)
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