Also called true rhyme or exact rhyme, a rhyme which meets the following requirements: (1) an exact correspondence in the vowel sound and, in words ending in consonants, the sound of the final consonant, (2) a difference in the consonant sounds preceding the vowel, and (3) a similarity of accent on the rhyming syllable(s).
Sidelight: A rhyme in which the perfect correspondence of sound is extended to include the consonant preceding the vowel, thus resulting in an identical pronunciation, but with different meaning and spelling, as in bear and bare, is said to be enriched and is called rich rhyme or rime riche (reem REESH). If the sound and spelling are the same, but the sense differs, as in blow (air movement) and blow (a sudden shock), it is called equivocal rhyme or rime equivoque (reem eh-kwee-VOHK). Both of these are types of identical rhymes. However, the terms rich rhyme, equivocal rhyme, and identical rhyme are misleading because, in a poetic sense, they are not considered to be legitimate rhymes.
(See also End Rhyme, Feminine Rhyme, Internal Rhyme, Masculine Rhyme )

This definition is in context to Poetry. See more contextual defintions for Perfect Rhyme.