Definition
To formally agree to something by signing a document or contract.
簽署同意（某事）
After months of negotiations, they were finally ready to sign on the dotted line.
經過數月的談判，他們終於準備好簽字了。
After carefully reading the terms, she signed on the dotted line for the job contract.
在仔細閱讀了條款後，她在工作合約上簽了字。
He hesitated for a moment, but eventually signed on the dotted line for the lease.
他猶豫了一下，但最終還是在租約上簽了字。