noun an unguent of the gods.
2. ambrosia ·noun a perfumed unguent, salve, or draught; something very pleasing to the taste or smell.
3. ambrosia ·noun the fabled food of the gods (as nectar was their drink), which conferred immortality upon those who partook of it.
4. ambrosia ·add. ·noun the food of certain small bark beetles, family scolytidae believed to be fungi cultivated by the beetles in their burrows.
5. ambrosia ·noun formerly, a kind of fragrant plant; now (bot.), a genus of plants, including some coarse and worthless weeds, called ragweed, hogweed, ·etc.