ylang ylang noun3 •The fragrant flower of a tropical tree (Cananga odorata) native to southeast Asia. •An essential oil derived from this flower used in aromatherapy and perfumes.Essential oils such as jasmine, rose, vetiver, ilang-ilang, iris, vanilla, sandalwood or lavender cannot be synthesised in the laboratory. — 2014 •The tree (Cananga odorata) on which ylang ylang flowers grow. formsylang ylangs · ylang-ylangs