Definitions for "Morality play"
a play employing allegorical characters, that is, personifications of abstractions, popular in the 15th and 16th centuries but sometimes useful in modern communication from playwright to audience. Example: "Dawn Will Come," a morality play by David Weinstock, 3m.
A play dealing with right and wrong, usually in the form of an allegory.
An allegorical medieval play form, in which the characters represent abstractions (Good Deeds, Death, and so on) and the overall impact of the play is moral instruction. The most famous of these plays in English is the anonymous Everyman (fifteenth century).