from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Intensity of emotion, especially strong desire, enthusiasm, or devotion. synonym: passion.

from The Century Dictionary.

  • noun Intense heat: as, the ardor of the sun's rays.
  • noun In pathology, a feeling of heat or burning.
  • noun A bright or effulgent spirit.
  • noun Warmth or heat, as of the passions and affections; eagerness; intensity.
  • noun Synonyms Fervor, fervency, vehemence, intensity, impetuosity.

from the GNU version of the Collaborative International Dictionary of English.

  • noun Heat, in a literal sense.
  • noun Warmth or heat of passion or affection; eagerness; zeal
  • noun Thus used by Milton. Bright and effulgent spirits; seraphim.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Great warmth of feeling; fervor; passion.
  • noun Spirit.
  • noun  Intense heat.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun intense feeling of love
  • noun a feeling of strong eagerness (usually in favor of a person or cause)
  • noun feelings of great warmth and intensity


from The American Heritage® Dictionary of the English Language, 4th Edition

[Middle English ardour, from Old French, from Latin ārdor, from ārdēre, to burn; see as- in Indo-European roots.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Anglo-Norman ardour, from Latin ardor, from ardere ("to burn").


Help support Wordnik (and make this page ad-free) by adopting the word ardor.



Log in or sign up to get involved in the conversation. It's quick and easy.

  • "He'd seen me kill her, right in front of his eyes. Granted, she'd betrayed and tortured him, and that should have doused his ardor, right there." -Club Dead, by Charlaine Harris

    February 5, 2011

  • I was surprised by his religious ardor, for he spoke as if fighting an army, but controlled as if holding a child. His ardor proclaimed his dominance, and he was never to be questioned again. He sleeps now, his ardor restrained, but it fights against the chains as the sun races his spirit to reach the beginning of a new day.

    March 20, 2011