shrill in WordNet English dictionary

1. utter a shrill cry
   shriek  shrill  pipe up  pipe 
   

1. having or emitting a high-pitched and sharp tone or tones
   "a shrill whistle"; "a shrill gaiety"
   shrill  sharp 
   
2. of colors that are bright and gaudy
   "a shrill turquoise"
   shrill 
   
3. being sharply insistent on being heard
   "strident demands"; "shrill criticism"
   strident  shrill