A
shout,
scream,
yell,
shriek,
hoot,
holler,
vociferation,
outcry, or
bellow is a loud vocalisation in which air is passed through the
vocal folds with greater force than is used in regular or close-distance vocalisation. This process can be performed by any creature possessing lungs, including humans. There are slight differences in meaning amongst them; for example, "scream" and "shriek" generally refer to a higher-pitched, sharp sound, used by some birds and other animals, and a "hoot", such as emitted by an owl, usually does not involve words.