Shrill

1. To utter an acute, piercing sound; to sound with a sharp, shrill tone; to become shrill.
2. Acute; sharp; piercing; having or emitting a sharp, piercing tone or sound; -- said of a sound, or of that which produces a sound.
3. To utter or express in a shrill tone; to cause to make a shrill sound.
4. A shrill sound.