What is the meaning of on earth?

adverb

  • Used with question words to convey surprise.
    • usage: "what on earth are you doing"
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). on earth. Retrieved September 20, 2026, from http://smartdefine.org/on_earth/definitions/1326045
ChicagoWordNet. 2010. "on earth" http://smartdefine.org/on_earth/definitions/1326045 (accessed September 20, 2026).
HarvardWordNet 2010, on earth, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/on_earth/definitions/1326045>.
MLAWordNet. "on earth" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/on_earth/definitions/1326045>