damselfly Syllabification: (dam·sel·fly)Pronunciation: /ˈdamzəlˌflī/Definition of damselfly noun (plural damselflies) a slender insect related to the dragonflies, having weak flight and 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 British & World English dictionary