GRUEL Meaning of GRUEL in English /grooh"euhl/ , n.a light, usually thin, cooked cereal made by boiling meal, esp. oatmeal, in water or milk. [ 1275-1325; ME gru- ( -el dim. suffix ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012