A nose, especially a large one.
An owl.
A woman's breast.
A siren or steam whistle, especially one in a factory and used to indicate the beginning or the end of a working day or shift.
The horn in a motor vehicle.
A penis.
A person who hoots.
A large cannabis cigarette.
Either of the two orifices located on the nose (or on the beak of a bird); used as a passage for air and other gases to travel the nasal passages.