exogamous a characterized by or fit for fertilization by a flower that is not closely related a pertaining to or characterized by the custom of marrying only outside the limits of a clan or tribe Usage(s) Except in France, where political philosophies tended to turn inward, most political movements of the past 150 years have been highly exogamous, often finding in partibus . Synonym(s) exogamic Antonym(s) autogamous endogamous