Definition of giddy adjective from the Oxford Advanced Learner's Dictionary

     

    giddy

     adjective
    adjective
    BrE BrE//ˈɡɪdi//
     
    ; NAmE NAmE//ˈɡɪdi//
     
    (giddier, giddiest) Excitement, Happiness
     
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  1. 1[not usually before noun] feeling that everything is moving and that you are going to fall synonym dizzy When I looked down from the top floor, I felt giddy.
  2. 2[not usually before noun] giddy (with something) so happy and excited that you cannot behave normally She was giddy with happiness. See related entries: Excitement, Happiness
  3. 3[usually before noun] making you feel as if you are about to fall The kids were pushing the roundabout at a giddy speed. (figurative) the giddy heights of success
  4. 4(old-fashioned) (of people) not serious synonym silly Isabel’s giddy young sister
  5. Word Origin Old English gidig ‘insane’, literally ‘possessed by a god’, from the base of God. Current senses date from late Middle English.Extra examples He felt tired and giddy from the sleeping pill. I was giddy with the heat. My mum came over all giddy and had to sit down. She was giddy with anticipation about spending two months with her father. Steep stairs may leave you giddy and faint.
See the Oxford Advanced American Dictionary entry: giddy