Blue

1. pl. Low spirits; a fit of despondency; melancholy.
2. superl. 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.
3. superl. 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.
4. superl. Low in spirits; melancholy; as, to feel blue.
5. superl. Suited to produce low spirits; gloomy in prospect; as, thongs looked blue.
6. superl. 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.
7. superl. Literary; — applied to women; — an abbreviation of bluestocking.
8. n. One of the seven colors into which the rays of light divide themselves, when refracted through a glass prism; the color of the clear sky, or a color resembling that, whether lighter or darker; a pigment having such color. Sometimes, poetically, the sky.
9. n. A pedantic woman; a bluestocking.
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The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.