Definition of monstrous

• a. - Marvelous; strange.
• a. - Having the qualities of a monster; deviating greatly from the natural form or character; abnormal; as, a monstrous birth.
• a. - Extraordinary in a way to excite wonder, dislike, apprehension, etc.; -- said of size, appearance, color, sound, etc.; as, a monstrous height; a monstrous ox; a monstrous story.
• a. - Extraordinary on account of ugliness, viciousness, or wickedness; hateful; horrible; dreadful.
• a. - Abounding in monsters.
• adv. - Exceedingly; very; very much.