1. (1737–93), American revolutionary and politician. Noted as the first signer of the Declaration of Independence in 1776, he was a member of the Continental Congress 1775–80, 1785, 1786 and its first president 1775–77. He was governor of Massachusetts 1780–85, 1787–93.
noun
1. one's signature:informal"I'd never given my John Hancock to a fan before"