Acute; sharp; piercing; having or emitting a sharp, piercing tone or sound; -- said of a sound, or of that which produces a sound.
- High-pitched and piercing in tone or sound: the shrill wail of a siren.
- Producing a sharp, high-pitched tone or sound: a shrill fife.
- Sharp or keen to the senses; harshly vivid: shrill colors.
- To utter in a shrill manner; scream.
- To produce a shrill cry or sound.