(1):

(v. i.) Acute; sharp; piercing; having or emitting a sharp, piercing tone or sound; - said of a sound, or of that which produces a sound.

(2):

(n.) A shrill sound.

(3):

(v. t.) To utter or express in a shrill tone; to cause to make a shrill sound.

(4):

(v. i.) To utter an acute, piercing sound; to sound with a sharp, shrill tone; to become shrill.