What is an imaginary monster, or hideous giant of fairy tales, who lived on human beings; hence, any frightful giant; a cruel monster. His schoolroom must have resembled an ogre's den. Maccaulay called?

ogre — An imaginary monster, or hideous giant of fairy tales, who lived on human beings; hence, any frightful giant; a cruel monster. His schoolroom must have resembled an ogre's den. Maccaulay. (Webster's 1913.)