adj. & v.
adj. (giddier, giddiest) 1 having a sensation of whirling and a tendency to fall, stagger, or spin round. 2 a overexcited as a result of success, pleasurable emotion, etc.; mentally intoxicated. b excitable, frivolous. 3 tending to make one giddy.
v.tr. & intr. (-ies, -ied) make or become giddy. giddily adv. giddiness n.
[ OE gidig insane, lit. 'possessed by a god' ]