X. 1. A mark serving as the signature of a person who is physically handicapped or illiterate. • The signer’s name usu. appears near the mark, and if the mark is to be notarized as a signature, two signing witnesses are ordinarily required in addition to the notary public. [Cases: Signatures  5.C.J.S. Signatures §§ 5, 8–11.] 2. A symbol equivalent to “by” when used in giving dimensions, as in 3 x 5 inches. 3. A mark placed on a document (such as an application) to indicate a selection, such as “yes” or “no”; esp., a mark on a ballot to indicate a vote.
[Blacks Law 8th]