What is hoot definition?

As a verb, "hoot" means to make a loud, harsh sound using one's voice or a horn, whistle, or other instrument. As a noun, "hoot" refers to the sound itself, often made by an owl or a car horn. It can also be used as an expression of derision or contempt, as in "That's a bunch of hooey!" or "He doesn't know what he's talking about, hoot!"