grue /ɡɹuː/adjective 2noun 6verb 1forms 4 adjective2 •Of an object, green when first observed before a specified time or blue when first observed after that time.The grue property is defined as: x is grue if and only if x is green and is observed before the year 2000, or x is blue and is not observed before the year 2000. — 1965 •Of a single color inclusive of both green and blue as different shades, used in translations from languages such as Old Welsh and Old Chinese that did not always distinguish between green and blue. noun6 •A fictional man-eating predator that dwells in the dark.I managed to get into the house through the front once, but I was plunged into darkness and eaten by a monster called a grue. — 1981 •The property of being green when first observed before a specified time or blue when first observed after that time.[T]he color grue would change in color. Colors do not do this; so ‘grue’ cannot be a color term. — 1994 •A single color inclusive of both green and blue as different shades, used in translations from languages such as Old Welsh and Old Chinese that did not always distinguish between green and blue.Our third hypothesis supposes that grue is based primarily on green but includes blues at lower membership. This hypothesis, the “skewed” grue, is illustrated in Figure 3d. — 1985 •Any byproduct of a gruesome event, such as gore, viscera, entrails, blood and guts.The butcher was covered in the accumulated grue of a hard day's workThere was grue everywhere after the accident •(Scotland) A shiver, a shudder.Upon all others the sight of Alison, were it but for a moment, cast a cold grue, not to be remembered without terror. — 1902 •(slang) Nutraloaf, a bland mixture of foods served in prisons. verb1 •(Scotland) To be frightened; also, to shudder with fear; to quake, to tremble. formsgrued · grueing · gruing · grues