(With reference to ancient Rome) a married woman, especially one considered as a type of feminine dignity of character or bearing; (more generally) any woman considered as having the qualities usually associated with the mother of a large family.
Origin
Late 16th century.
Definition of Roman matron in US English:
Roman matron
noun
(With reference to ancient Rome) a married woman, especially one considered as a type of feminine dignity of character or bearing; (more generally) any woman considered as having the qualities usually associated with the mother of a large family.