01 a. Having vigorous powers of life; tenacious of life; long-lived.
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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.
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2.
Sprightly in temper or conduct; lively; merry; as, a vivacious poet.
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3.
Living through the winter, or from year to year; perennial.(Bot.) [R.]