1) capitalized : January 6 observed as a church festival in commemoration of the coming of the Magi as the first manifestation of Christ to the Gentiles; Twelfth-day.
2) an appearance or manifestation especially of a divine being or deity.
3) a. a sudden manifestation or intuitive perception of the essential nature or meaning of something
b. an intuitive grasp of reality through a simple or commonplace occurrence, event or experience.
c. an illuminating discovery, realization, or disclosure
d. a revealing scene or moment
4) a literary work or section of a work presenting, usually symbolically, such a moment of revelation and insight.