Sign

Verb. 1. To mark with characters or one's name. To sign a paper, note, deed, etc. is to write one's name at the foot, or underneath the declaration, promise, covenant, grant, etc., by which the person makes it his own act, to sign one's name, is to write or subscribe it on the paper. Signing does not now include sealing.

2. To signify; to represent typically. [Not in use.]
3. To mark.
4. To give witness to consent or agreement to the terms and conditions contained within the four corners of a document, which implies one read it, understands it, and voluntarily agrees to be bound by it.