cray /kɹæɪ/adjective 1noun 1forms 3 adjective1 •(slang) Crazy.That small of a fine for that kind of blatant disregard is cray. — 2010 noun1 •A crayfish or lobster.The third stage occurs when the crays moult into miniature adults. They are now completely independent of the mother and leave her permanently after a week or so. — 2012 formscrays · more cray · most cray