noun
- great warmth and earnestness of feeling: to speak with great fervor.
- intense heat.
noun
- great intensity of feeling or belief; ardour; zeal
- rare intense heat
chiefly British English spelling of fervor (q.v.); for spelling, see -or.
mid-14c., “warmth or glow of feeling,” from Old French fervor (Modern French ferveur) “heat, enthusiasm, ardor, passion,” from Latin fervor “a boiling, violent heat; passion, ardor, fury,” from fervere “to boil” (see brew).