What is the meaning of Shriek?

A sharp, shrill outcry or scream; a shrill wild cry caused by sudden or extreme terror, pain, or the like.

An exclamation mark.

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.

To utter sharply and shrilly; to utter in or with a shriek or shrieks.

Source: wiktionary.org