• any of numerous small chiefly Blue butterflies of the family Lycaenidae
• the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic
• Blue clothing; "she was wearing Blue"
• the color of the clear sky in the daytime; "he had eyes of bright Blue"
• any organization or party whose uniforms or badges are Blue; "the Union army was a vast Blue"
• the sky as viewed during daylight; "he shot an arrow into the Blue"
• used to whiten laundry or hair or give it a bluish tinge
• turn Blue
• causing dejection; "a Blue day"; "the dark days of the war"; "a week of rainy depressing weather"; "a disconsolate winter landscape"; "the first dismal dispiriting days of November"; "a dark gloomy day"; "grim rainy weather"
• having a color similar to that of a clear unclouded sky; "October''s bright Blue weather"- Helen Hunt Jackson; "a Blue flame"; "Blue haze of tobacco smoke"
• characterized by profanity or cursing; "foul-mouthed and blasphemous"; "Blue language"; "profane words"
• low in spirits; "lonely and Blue in a strange city"; "depressed by the loss of his job"; "a dispirited and resigned expression on her face"; "downcast after his defeat"; "feeling discouraged and downhearted"
• belonging to or characteristic of the nobility or aristocracy; "an aristocratic family"; "aristocratic Bostonians"; "aristocratic government"; "a Blue family"; "Blue blood"; "the Blue-blooded aristocracy"; "of gentle blood"; "patrician landholders of the
• used to signify the Union forces in the Civil War (who wore Blue uniforms); "a ragged Blue line"
• suggestive of sexual impropriety; "a Blue movie"; "Blue jokes"; "he skips asterisks and gives you the gamy details"; "a juicy scandal"; "a naughty wink"; "naughty words"; "racy anecdotes"; "a risque story"; "spicy gossip"

'Blue' in other languages