A sign is a mark, symbol, or object that gives information, instructions, or a warning. More generally, it is anything that shows that something exists or is happening.
“Sign” comes from Old French “seigne” and Latin “signum,” meaning mark, token, or signal. It originally referred to physical marks like flags or seals that stood for something. Over time it expanded to cover any indicator or symbol.
From road signs to zodiac signs to sign language, the core idea is always ‘something that stands for something else.’ Once you see that, ‘sign here’ in a contract is just you making a personal symbol of agreement. The whole word family is about turning invisible ideas into visible marks.
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