Original: In biology, the imago is the last stage of development of an insect, after the last ecdysis of an incomplete metamorphosis, or after emergence from the pupa where the metamorphosis is complete.
Simplified: In biology, the imago is the last stage in the development of an insect. It comes after the last ecdysis of an incomplete metamorphosis, or after emergence from the pupa where the metamorphosis is complete.