Webster’s Revised Unabridged Dictionary · 1913
Vivacious
Vi·va′cious, a. [L. vívax, -acis, fr. vivere to live. See Vivid.] 1. Having vigorous powers of life; tenacious of life; long-lived. [Obs.]
Hitherto the English bishops have been vivacious almost to wonder. . . . But five died for the first twenty years of her [Queen Elizabeth's] reign. Fuller.
The faith of Christianity is far more vivacious than any mere ravishment of the imagination can ever be. I. Taylor.
2. Sprightly in temper or conduct; lively; merry; as, a vivacious poet. "Vivacious nonsense." V. Knox.
3. (Bot.) Living through the winter, or from year to year; perennial. [R.]
Syn. — Sprightly; active; animated; sportive; gay; merry; jocund; light-hearted.
— Vi·va′cious·ly, adv. — Vi·va′cious·ness, n.