A space left unfilled in a written document, in which one or more words or marks are to be inserted to complete the sense. Angle v. Insurance Co., 92 U. S. 337, 23 L. Ed. 556. Also a skeleton or printed form for any legal document, In which the necessary and invariable words are printed In their proper order, with blank spaces left for the insertion of such names, dates, figures, additional clauses, etc., as may be necessary to adapt the instrument to the particular case and to the design of the party using It