- The definition of a deuteragonist is the second most important character after the protagonist.
An example of a deuteragonist is a superhero's leading lady.
Origin: Classical Greek deuteragōnistēs: see deutero- and amp; agonize and amp; -ist
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Origin: Greek deuteragōnistēs, an actor of second-class parts : deuteros, second; see deu-1 in Indo-European roots + agōnistēs, actor; see protagonist.