First color in the rainbow Crossword Clue

RED(noun)

1. Any of a range of colours having the longest wavelengths, 670 nm, of the visible spectrum; a primary additive colour for transmitted light: the colour obtained by subtracting green and blue from white light using magenta and yellow filters; the colour of blood, ripe strawberries, etc.

2. A revolutionary socialist or (most commonly) a Communist; (usually capitalized) a Bolshevik, a supporter of the Bolsheviks in the Russian Civil War.

RED(adjective)

1. Having red as its color.

2. (of hair) Having an orange-brown or orange-blond colour; ginger.

RED(verb)

1. To govern, protect.

2. To discuss, deliberate.