Deus ex machina (/ˌdeɪəs ɛks ˈmækɪnə, - ˈmɑːk-/ DAY-əs ex-MA(H)K-in-ə,[1] Latin: [ˈdɛ.ʊs ɛks ˈmaːkʰɪnaː]; plural: dei ex machina; English "god out of the machine") is a plot device whereby a seemingly unsolvable problem in a story is suddenly and abruptly resolved by an unexpected and unlikely occurrence.[4][5] Its function is generally to resolve an otherwise irresolvable plot situation, to surprise the audience, to bring the tale to a happy ending, or act as a comedic device.

Deus ex machina is a Latin calque from Greek ἀπὸ μηχανῆς θεός (apò mēkhanês theós) 'god from the machine'.[7] The term was coined from the conventions of ancient Greek theater, where actors who were playing gods were brought onto stage using a machine. The machine could be either a crane (mechane) used to lower actors from above or a riser that brought them up through a trapdoor. Aeschylus introduced the idea, and it was used often to resolve the conflict and conclude the drama. The device is associated mostly with Greek tragedy, although it also appeared in comedies. — Wikipedia