honeydew UK /ˈhʌnɪdjuː/US /ˈhʌniˌd(j)u/noun 7adjective 1forms 3 noun7 •A sweet, sticky substance deposited on leaves and other plant parts by insects (especially aphids and scale insects) feeding on plant sap, or by fungi. •Ellipsis of honeydew melon (“a melon from the Cucumis melo Inodorus cultivar group, with sweet, light green or white flesh and a smooth greenish-white or yellow rind”). •A sweet liquid substance resembling the substance mentioned in sense 1, such as honey, nectar, or manna in the Bible.[F]resh teares / Stood on her cheeks, as doth the honie devv, / Vpon a gathred Lillie almost vvithered. — 1588 •A light green colour, like the flesh of some honeydew melons. •(figurative) Something that is enjoyable or pleasant.He was held vnworthy euer after to sucke the Hony dew of Peace, that (against his comming, by whom our Peace weares a triple Wreathe) would offer to play the Droane. — 1604 •A blackish mould (often called sooty mould) produced by fungi of the order Dothideales, feeding on the substance mentioned in sense 1. •In full honeydew tobacco: a fine sort of tobacco moistened with a sweet substance (originally molasses). adjective1 •Of a light green colour, like the flesh of some honeydew melons. formshoneydews · more honeydew · most honeydew