jonquil UK /ˈd͡ʒɒŋkwəl/US /ˈd͡ʒɑŋkwəl/ noun2 •A fragrant bulb flower (Narcissus jonquilla), a species of daffodil. •A shade of yellow.She had a jonquil silk pelisse, a bonnet of the same colour, with a bird of paradise plume, looking very much like an illuminated butterfly. — 1838 formsjonquils