ETYM Latin ardor, from ardere to burn: cf. Old Fren. ardor, ardur, French ardeur.
(Alternate spelling: ardour).
1. A feeling of strong eagerness (usually in favor of a person or cause); SYN. ardour, elan, zeal.
2. Feelings of great warmth and intensity; SYN. ardour, fervor, fervour, fervency, fire, fervidness.
3. Intense feeling of love; SYN. ardour.