noun. 1 A person’s name written in a distinctive way as a form of identification in authorizing a cheque or document or concluding a letter: the signature of a senior manager. More example sentences. 1  The analysis concluded that the signature on the document was ‘very similar’ to Chen's.2  A petition is nothing more than a list of names, addresses and signatures with your cause written at the top of each page. A person’s name written in a distinctive way as a form of identification in authorizing a cheque or document or concluding a letter: the signature of a senior manager. More example sentences. 1  The analysis concluded that the signature on the document was ‘very similar’ to Chen's.