[ lahyt-hed-id ]
See synonyms for: lightheadedlightheadedness on

  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.

Origin of lightheaded

First recorded in 1530–40; light2 + head + -ed3

Other words from lightheaded

  • light·head·ed·ly, adverb
  • light·head·ed·ness, noun

Words Nearby lightheaded Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use lightheaded in a sentence

  • The young girl thought that Valentin had grown lightheaded; she took the talisman and went to fetch the lamp.

    The Magic Skin | Honore de Balzac
  • Besides, I was beginning to feel lightheaded and worn out, partly from lack of food, no doubt.

    Pieces of Eight | Richard le Gallienne
  • Got a red face—toothache didn't make you a trifle lightheaded, did it?

British Dictionary definitions for light-headed


  1. frivolous in disposition or behaviour

  2. giddy; feeling faint or slightly delirious

Derived forms of light-headed

  • light-headedly, adverb
  • light-headedness, noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012