The definition of a rhyme scheme is a specific pattern used in a poem that determines which lines rhyme.
An example of a rhyme scheme is an AA BB scheme, which means the first line rhymes with the second line, and the third line rhymes with the fourth line.
the pattern of rhymes, esp. end rhymes, used in a piece of verse, usually indicated by letters: ababbcc is the rhyme scheme of rhyme royal
The arrangement of rhymes in a poem or stanza.