Having red as its color.
The girl wore a red skirt.
(of hair) Having an orange-brown or orange-blond colour; ginger.
Her hair had red highlights.
(of a card) Of the hearts or diamonds suits. Compare black
I got two red queens, and he got one of the black queens.
(often capitalized) Supportive of, related to, or dominated by a political party or movement represented by the color red:
Amerind; relating to Amerindians or First Nations
Of the lower-frequency region of the (typically visible) part of the electromagnetic spectrum which is relevant in the specific observation.
Having a color charge of red.