Dictionary

Of the colour blue.

Example: the deep blue sea

Depressed, melancholic, sad.

Pale, without redness or glare; said of a flame.

Example: The candle burns blue.

Supportive of, run by (a member of), pertaining to, or dominated by a political party represented by the colour blue.

A blue blazer, part of the school uniform at Harrow School.

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.

Blue clothing

Example: The boys in blue marched to the pipers.