Signature (noun)

1. A person's name written in their own handwriting, as a form of identification in authorizing a document or cheque.
2. A musician or band's identifying style or sound.
3. A distinctive pattern, product, or characteristic by which someone or something can be identified.
4. A person's handwriting, especially as used to sign their name.
5. A piece of music, dance, or other performance that is identified with a particular performer or group.

Origin:

Late middle english: from latin signatura, from signare "to sign".

Examples:

1. He signed the document with his signature.
2. The signature dish of the restaurant was the steak.
3. The artist's signature style was bold brushstrokes.
4. The singer"s signature song is "My Heart Will Go On".
5. The house's signature feature was the fireplace.