- to pronounce (a vowel usually rounded) without rounding of the lips
- to keep (the lips) from being rounded, as in pronouncing the vowel in she
transitive verbun·round·ed, un·round·ing, un·rounds
To pronounce (a sound) with the lips in a flattened or neutral position.
(third-person singular simple present unrounds, present participle unrounding, simple past and past participle unrounded)
- (linguistics) To change (a vowel) so that it is no longer round.