Pronunciation: (di-sim"u-lā'shun), [key]
1. the act of making or becoming unlike.
2. Phonet.the process by which a speech sound becomes different from or less like a neighboring sound, as pilgrimPronunciation: (pil'grim) [key]from Latin peregrīnusPronunciation: (per"e-grē'noos), [key]and purplePronunciation: (pûr'pul) [key]from Old English purpurePronunciation: (poor'poo-re), [key]or disappears entirely because of a like sound in another syllable, as in the pronunciationPronunciation: (guv'u-nur) [key]for governor. Cf. assimilation (def. 5).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.