The part projecting above the mouth on the face of a person or animal. Usually.
Most noses contain the nostrils and are used for breathing and smelling.
Some noses are known to exist completely on their own, i.e. not attached to the face of a person or animal. They are known as self-standing noses. Very few have been spotted. Occasionally, very occasionally, a self-standing nose might enter an urban area and start sniffing around.
This is what we know about self-standing noses:
Where they come from? No idea
Why they come into urban areas? No idea
How do they stay alive? By breathing
What do they eat? No idea
How do they eat? No idea
Can they communicate? No idea
Are they annoying? VERY!