neroli UK /ˈnɪəɹəli/US /ˈnɛɹəli/ noun1 •More fully neroli oil or oil of neroli: an essential oil distilled from the blossoms of the bitter orange or Seville orange (Citrus × aurantium subsp. amara) used to make perfumes.NEROLY, a sort of Perfume. — 1724 formsnerolis