New American Oxford Dictionary
ditzy
dit zy |ˈditsē ˈdɪtsi |(also ditsy ) ▶adjective informal silly or scatterbrained: don't tell me my ditzy secretary didn't send you an invitation! DERIVATIVES dit zi ness noun ORIGIN 1970s: of unknown origin.
Oxford Dictionary
ditzy
ditzy |ˈdɪtsi |(also ditsy ) ▶adjective ( ditzier, ditziest; ditsier, ditsiest ) N. Amer. informal silly or scatterbrained: don't tell me my ditzy secretary didn't send you an invitation! DERIVATIVES ditziness noun ORIGIN 1970s: of unknown origin.
American Oxford Thesaurus
ditzy, ditsy
ditzy, ditsy adjective informal she's almost too convincing in the part of the ditzy secretary: silly, foolish, giddy, lightheaded, scatterbrained, featherbrained, harebrained, empty-headed, vacuous, stupid, brainless; skittish, flighty, fickle, capricious, whimsical, inconstant; informal dippy, dizzy, dopey.