A pattern or gauge, such as a thin metal plate with a cut pattern, used as a guide in making something accurately, as in woodworking or the carving of architectural profiles. 
Computer Science. 
A document or file having a preset format, used as a starting point for a particular application so that the format does not have to be recreated each time it is used: a loan amortization template for a spreadsheet program. 
An overlay that fits over all or part of a keyboard and has labels describing the functions of each key within a particular application.