A squeal is a high-pitched sound people make when they're excited or shocked.
When someone hears something amazing or disturbing, like seeing their favorite animal at the zoo or being surprised by bad news, they might let out a squeal. For example, if you're watching a scary movie and suddenly see a ghost jump out from behind a door, your friend in the same room might make a loud, shrill sound – that's a squeal!
A high-pitched sound, such as the scream of a child, or noisy worn-down brake pads.
To scream with a shrill, prolonged sound.
