(1):
(a.) Abounding in monsters.
(2):
(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.
(3):
(a.) Having the qualities of a monster; deviating greatly from the natural form or character; abnormal; as, a monstrous birth.
(4):
(a.) Marvelous; strange.
(5):
(a.) Extraordinary on account of ugliness, viciousness, or wickedness; hateful; horrible; dreadful.
(6):
(adv.) Exceedingly; very; very much.