Meaning of “signature” - Learner’s Dictionary

signature

noun [ C ] us uk /ˈsɪɡnətʃər/
The petition contained over five thousand signatures.Check the signature against the one on the card.The contract requires your signature in order to be valid.I recognised his signature.Her signature just looks like a squiggle.

B1 your name written in your own way which is difficult for someone else to copy

(Definition of “signature” from the Cambridge Learner’s Dictionary © Cambridge University Press)