Definition of "blue"
Having a bluish colour shade.
Depressed, melancholic, sad.
Pornographic or profane.
Supportive of, run by, pertaining to, or dominated by a political party represented by the colour blue. (e.g. The Conservatives, the Democrats).
Of the higher-frequency region of the part of the electromagnetic spectrum which is relevant in the specific observation.
Extra rare; left very raw and cold.
Possessing a coat of fur that is a shade of gray.
The colour of the clear sky or the deep sea, between green and violet in the visible spectrum, and one of the primary additive colours for transmitted light; the colour obtained by subtracting red and green from white light using magenta and cyan filters; or any colour resembling this.
A blue dye or pigment.
Any of several processes to protect metal against rust.
The sky, literally or figuratively.
The ocean; deep waters.
Anything blue, especially to distinguish it from similar objects differing only in color.
One of the colour balls used in snooker with a value of 5 points.
Any of the blue-winged butterflies of the subfamily Polyommatinae in the family Lycaenidae.
A liquid with an intense blue colour, added to a laundry wash to prevent yellowing of white clothes.
A type of firecracker.
To make or become blue.
(metallurgy) To treat the surface of steel so that it is passivated chemically and becomes more resistant to rust.
To spend (money) extravagantly; to blow.