Meaning

adjective of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies

adjective characterized by violence or bloodshed; - Andrea Parke; - Thomas Gray; - Hudson Strode

adjective (especially of the face) reddened or suffused with or as if with blood from emotion or exertion

originBorrowed from German Redder.

Etymology from Wiktionary, CC BY-SA 3.0