sign - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “sign”

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sign

noun [C]  us   /sɑɪn/

sign noun [C] (MARK)

a written or printed mark that has a standard meaning: The symbol for subtraction is the minus sign.

sign noun [C] (PUBLIC INFORMATION)

a device that gives information to people who see it: a stop sign A neon sign marked the entrance to the parking garage.

sign noun [C] (BODY MOVEMENT)

a movement of the hands or body that gives information or an instruction: He kept giving me the cut-throat sign to end the speech.

sign noun [C] (SIGNAL)

a signal that something exists or that shows what might happen in the future: She was at least sharing her problems with me, and that was a sign of progress. There was nobody in the place, and I thought that was a bad sign. There are signs that he is thinking of running for president.

sign

verb  us   /sɑɪn/

sign verb (WRITE)

[I/T] to write your name on a document to show that you agree with it or that you have written it yourself: [T] to sign a letter/contract/check [I] Please sign for the package when it arrives (= write your name on a form to show that you have received it). [I/T] If an organization signs someone, that person has officially become a member of the organization by agreeing to a contract: [T] The team signed four new players this week.

sign verb (COMMUNICATE)

to communicate by using hand movements: [+ that clause] He signed that he’d be ready in five minutes.
(Definition of sign from the Cambridge Academic Content Dictionary © Cambridge University Press)
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