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Meaning of lightheaded

light•head•ed

Pronunciation: (līt'hed'id), [key]
— adj.
  1. giddy, dizzy, or delirious: After two drinks Pat began to feel lightheaded.
  2. having or showing a frivolous or volatile disposition; thoughtless: lightheaded persons.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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