Definition of "evolutionary theory" [evolutionary theory]

• Any of several theories that have evolved over time. (noun)
• The theory of evolution. (noun)

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• "The evangelical crowd gleefully proclaimed that the hadal bestiary proved evolutionary theory was a false doctrine."
• "Evelyn Hutchinson gathered around himself at Yale a small circle of extraordinary graduate students, to whom he was teaching evolutionary theory and “stressing over and over again that ecology needs an evolutionary twist.”"
• "Second (and occupying the entire second volume of the work), he directed himself to discussing the phe - nomena of inheritance and the causes of variation — on both of which his evolutionary theory so evidently depended."