imago Syllabification: (i·ma·go)Pronunciation: /iˈmāgō, iˈmä-/Definition of imago noun (plural imagos, imagoes or imagines /iˈmāgəˌnēz/) 1 Entomology the final and fully developed adult stage of an insect, typically winged. 2 Psychoanalysis an unconscious, idealized mental image of someone, especially a parent, that influences a person’s behavior. Origin: late 18th century (sense 1): modern Latin use of Latin imago 'image'. sense 2 dates from the early 20th centuryimago in other Oxford dictionaries Definition of imago in the British & World English dictionary