1. (initial capital letter) a Christian festival, observed on January 6, commemorating the manifestation of Christ to the gentiles in the persons of the Magi; Twelfth-day.
2. an appearance or manifestation, esp. of a deity.
3. a sudden, intuitive perception of or insight into the reality or essential meaning of something, usually initiated by some simple, homely, or commonplace occurrence or experience.
4. a literary work or section of a work presenting, usually symbolically, such a moment of revelation and insight.