1. the r-sound as reintroduced into an utterance where there is an r in the spelling by speakers of an r-dropping dialect when a postvocalic r they would normally drop, as in the pronunciation of far asPronunciation: (fä), [key]becomes intervocalic, as in far away pronounced asPronunciation: (fär'u-wā'). [key]
2. Also called intrusive r. the r-sound as inserted analogously by speakers of an r-dropping dialect between vowels where there is no corresponding r in the spelling, as in the pronunciation of Cuba is asPronunciation: (kyOO'bu-riz). [key]
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.