Definitions
1.nounThe 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.
2.nounA blue dye or pigment.
3.nounAny of several processes to protect metal against rust.
4.nounBlue clothing"The boys in blue marched to the pipers."
5.noun(in the plural) A blue uniform. See blues.
6.nounA member of law enforcement
7.nounThe sky, literally or figuratively."His request for leave came out of the blue."
8.nounThe ocean; deep waters.
9.nounThe far distance; a remote or distant place.
10.nounAnything blue, especially to distinguish it from similar objects differing only in color.
11.nounA dog or cat with a slaty gray coat.
12.nounOne of the colour balls used in snooker, with a value of five points.
13.nounAny of the butterflies of the subfamily Polyommatinae in the family Lycaenidae, most of which have blue on their wings.
14.nounA bluefish.
15.nounAn argument.
16.nounA liquid with an intense blue colour, added to a laundry wash to prevent yellowing of white clothes.
17.nounA type of firecracker.
18.nounA bluestocking.
19.nounOne of the three color charges for quarks.
20.verbTo make or become blue.
21.verbTo treat the surface of steel so that it is passivated chemically and becomes more resistant to rust.
22.verb(laundry) To brighten by treating with blue (laundry aid)
23.verbTo spend (money) extravagantly; to blow.
24.adjectiveOf the colour blue."the deep blue sea"
25.adjectiveDepressed, melancholic, sad.
26.adjectivePale, without redness or glare; said of a flame."The candle burns blue."
27.adjectiveSupportive of, run by (a member of), pertaining to, or dominated by a political party represented by the colour blue.
28.adjectiveOf the higher-frequency region of the part of the electromagnetic spectrum which is relevant in the specific observation.
29.adjective(of steak) Extra rare; left very raw and cold.
30.adjective(of a dog or cat) Having a coat of fur of a slaty gray shade.
31.adjectiveSevere or overly strict in morals; gloomy."blue and sour religionists; blue laws"
32.adjective(of women) literary; bluestockinged.
33.adjectiveHaving a color charge of blue.
34.adjective(entertainment) Risque or obscene"His material is too blue for prime-time"