oxblood noun 2adjective 1forms 2 noun2 •The blood of an ox.[…] we can change clothes, and with the aid of a bottle of oxblood, which is secreted about my person, we will deceive the tyrant, and spare a nobleman who does honour to Japan. — 1866 •A dark brownish-red colour. adjective1 •Of a dark brownish-red colour.He was tall and lean, with lank fair hair and a square jaw, togged out in tweeds and a checked shirt and scuffed, oxblood brogues. — 1993 formsmore oxblood · most oxblood