(1):
(superl.) Causing, or tending to cause, giddiness or vertigo.
(2):
(v. t.) To make dizzy or giddy; to give the vertigo to; to confuse.
(3):
(superl.) Having in the head a sensation of whirling, with a tendency to fall; vertiginous; giddy; hence, confused; indistinct.
(4):
(superl.) Without distinct thought; unreflecting; thoughtless; heedless.