damselflyPronunciation: /ˈdamz(ə)lflʌɪ/Definition of damselfly noun (plural damselflies) a slender insect related to the dragonflies, typically resting with the wings folded back along the body. Suborder Zygoptera, order Odonata: several families. damselfly in other Oxford dictionaries Definition of damselfly in the US English dictionary