Of the colour blue.
the deep blue sea
Depressed, melancholic, sad.
Pale, without redness or glare; said of a flame.
The candle burns blue.
Supportive of, run by (a member of), pertaining to, or dominated by a political party represented by the colour blue.
Of the higher-frequency region of the part of the electromagnetic spectrum which is relevant in the specific observation.
(of steak) Extra rare; left very raw and cold.
(of a dog or cat) Having a coat of fur of a slaty gray shade.
Severe or overly strict in morals; gloomy.
blue and sour religionists; blue laws
(of women) literary; bluestockinged.
Having a color charge of blue.
(entertainment) Risque or obscene
His material is too blue for prime-time