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English definition of “sign”

sign

verb
 
 
/saɪn/
[I or T] to write your name, usually on a written or printed document, for example to show that you agree with its contents or have written or created it yourself: sign a contract/agreement/declaration We've already agreed the details and I just need to sign a contract. sign a letter/form/cheque Please sign your name below if you are available to help. Sign here please.
signed and sealed (also signed, sealed, and delivered) finished and official because all the necessary documents have been signed: The project can start now that the contract has been signed and sealed.
sign on the dotted line to agree to do something, especially by signing an agreement: Many people sign on the dotted line without reading their policy documents.
(Definition of sign verb from the Cambridge Business English Dictionary © Cambridge University Press)
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