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shrillness(noun) the quality of being sharp or harsh to the senses. the shrillness of her hair color. shrillness, stridence, stridency(noun) having the timbre of a loud high-pitched sound.
Definition of whine for English Language Learners. : 1  to complain in an annoying way. : 2  to make a high, crying sound. : 3  to make a high and unpleasant sound that continues for a long time.