Ar"dor (?), n. [L. ardor, fr.
ardere to burn: cf. OF. ardor, ardur, F.
ardeur.] [Spelt also ardour.] 1. Heat,
in a literal sense; as, the ardor of the sun's rays.
2. Warmth or heat of passion or affection;
eagerness; zeal; as, he pursues study with ardor; the fought with
ardor; martial ardor.
3. pl. Bright and effulgent spirits;
seraphim. [Thus used by Milton.]
Syn. -- Fervor; warmth; eagerness. See Fervor.