- Having the color of the clear sky, or a hue resembling it, whether lighter or darker; as, the deep, blue sea; as blue as a sapphire; blue violets."The bluefirmament." [Milton.]
- Pale, without redness or glare, -- said of a flame; hence, of the color of burning brimstone, betokening the presence of ghosts or devils; as, the candle burns blue; the air was blue with oaths.
- Low in spirits; melancholy; as, to feel blue .
- Suited to produce low spirits; gloomy in prospect; as, thongs looked blue .(Colloq)
- Severe or over strict in morals; gloom; as, blue and sour religionists; suiting one who is over strict in morals; inculcating an impracticable, severe, or gloomy mortality; as, blue laws.
- Literary; -- applied to women; -- an abbreviation of bluestocking.(Colloq)"The ladies were very blue and well informed." [Thackeray.]"For his religion . . . 'T was Presbyterian, true blue." [Hudibras.]
Etymology: OE. bla blo blew, blue, livid, black, fr. Icel.blār livid; akin to Dan. blaa blue, Sw. blå, D. blauw, OHG. blāo, G. blau; but influenced in form by F. bleu, from OHG. blāo