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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.
See Also: HARSHNESS. 1  A hard, crushing voice like stones smashing against each other âAharon Megged. 2  Her voice â¦ creaked like the hinges of a rusty iron gate âStefan Zweig. 3  Her voice flew around like pots and pans âLeonard Michaels.  Her voice sounded as brittle and sharp as a broken sliver of glass âGraham Masterton.