great warmth of feeling; fervor; passion: She spoke persuasively and with ardor.
intense devotion, eagerness, or enthusiasm; zeal: his well-known ardor for Chinese art.
burning heat.

Also especially British, ar·dour.

Origin of ardor

1350–1400; Middle English < Latin, equivalent to ārd(ēre) to burn + -or -or1; replacing Middle English ardure < Old French ardur < Latin, as above; 17th century ardour < Anglo-French < Latin, as above

Synonyms for ardor Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ardor

Contemporary Examples of ardor

Historical Examples of ardor

  • The ardor of Mr. Gladstone's feelings on this subject is notorious.

    The Grand Old Man

    Richard B. Cook

  • Man-like, hot with the ardor of the chase, he was deaf and blind to all else.

    The Black Bag

    Louis Joseph Vance

  • This feeling, be it understood, in no wise chilled my ardor.

  • He had been prepared for it, and to resist it, and break it down by the ardor of his appeal.

    The Law-Breakers

    Ridgwell Cullum

  • It was a problem which he debated with an ardor that had in it something of passion.

    A Spirit in Prison

    Robert Hichens

Word Origin and History for ardor

early 15c., "heat of passion or desire," from Old French ardure "heat, glow; passion" (12c.), from Latin ardorem (nominative ardor) "a flame, fire, burning, heat;" also of feelings, etc., "eagerness, zeal," from ardere "to burn" (see ardent). In Middle English, used of base passions; since Milton's time, of noble ones.

Online Etymology Dictionary, © 2010 Douglas Harper