1 serving or tending to distinguish
2 denoting one of a set of minimal features of a phoneme in a given language that serve to distinguish it from other phonemes. The distinctive features of /p/ in English are that it is voiceless, bilabial, non-nasal, and plosive; /b/ is voiced, bilabial, non-nasal, and plosive: the two differ by the distinctive feature of voice
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