To write or put (one's name) to a paper or document.

署名；签名。

To give or promise (a sum of money) for some object, by writing one's name.

(署名)认捐；认购。

To give consent to.

允诺。

To bear witness to by signing.

署名为证。

To sign one's name to a letter or other document.

(于信件上或文件上)签名。

To give consent by signing something; hence, to agree.

签名以示允诺。

To sign a paper in token of promise to give a certain sum, or to take and pay for something, as a book.

认捐；认购；订阅；预约(如书)。