Merriam-Webster's Collegiate® Dictionary, 11th Edition
RHYME
I. noun also rime
Etymology: Middle English rime, from Anglo-French
Date: 13th century
1. a. rhyming verse, poetry , a composition in verse that rhymes,
2. correspondence in terminal sounds of units of composition or utterance (as two or more words or lines of verse), one of two or more words thus corresponding in sound, correspondence of other than terminal word sounds: as, alliteration , internal rhyme , rhythm , measure , rhymeless adjective
II. verb also rime (rhymed; also rimed; rhyming; also riming)
Date: 14th century
transitive verb to relate or praise in rhyming verse,
2. to put into rhyme, to compose (verse) in rhyme, to cause to rhyme ; use as rhyme, intransitive verb to make rhymes, to end in syllables that are rhymes, to be in accord ; harmonize , rhymer noun