ag·on (ăg'?n, -ōn, ä-gōn')
n., pl. a·gon·es (ă-gō'nēz).

1. A conflict, especially between the protagonist and antagonist in a work of literature.
   
2. The part of an ancient Greek drama, especially a comedy, in which two characters engage in verbal dispute.
   
3. A test of will; a conflict: "Freud's originality stemmed from his aggression and ambition in his agon with biology" (Harold Bloom).
   
4. A contest in ancient Greece, as in athletics or music, in which prizes were awarded.

[Greek agōn. See agony.]