say it: GID-ee
giddy is an adjective meaning "having or causing a whirling sensation; liable to falling". It carries 2 recorded senses.
having or causing a whirling sensation; liable to falling
“had a dizzy spell”
“a dizzy pinnacle”
“had a headache and felt giddy”
“a giddy precipice”
“feeling woozy from the blow on his head”
“a vertiginous climb up the face of the cliff”
lacking seriousness; given to frivolity
“a dizzy blonde”
“light-headed teenagers”
“silly giggles”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for giddy come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.