John-hancock definitions

A person's signature.
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A person's signature.
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(idiomatic) One's signature.

Please put your John Hancock on the dotted line to close the deal.

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Origin of john-hancock

Named for John Hancock, the first person to sign the United States Declaration of Independence. According to legend, he signed his name largely and clearly to be sure King George III could read it, causing his name to become an eponym for "signature". However, other examples show that Hancock always wrote his signature this way.