v. i. - To utter a loud, sharp, shrill sound or cry, as do some birds and beasts; to scream, as in a sudden fright, in horror or anguish.
v. t. - To utter sharply and shrilly; to utter in or with a shriek or shrieks.
n. - A sharp, shrill outcry or scream; a shrill wild cry such as is caused by sudden or extreme terror, pain, or the like.