imago 1. the final and fully developed stage of an insect after all metamorphoses e.g. a butterfly or beetle. 2. Psychoanal. an idealised concept of a loved one formed in childhood and retained uncorrected in adult life. Molly Rose Moon dreamt of worms the night before she married Jimmy Brown in Tooting Bec. Milky sticky wet worms wriggled and fed off one another in clumps all over the...