Meanings of rhymed couplet in английском

Thus the rhymed couplet

Creeping up silently, the anxious mother heard to her joy, a rhymed couplet and caught the sound of a name, several times repeated.

Life grew again something mysterious, not to be comprehended by the "good sense" of the Augustans, or expressible in the terms of the rhymed couplet.

Upon it there were ten rhymed couplets.

A casual acquaintance once presented to me an epic he had written in rhymed couplets, extending to many cantos.