A blueprint is a guide for making something — it's a design or pattern that can be followed. Want to build the best tree house ever? Draw up a blueprint and follow the design carefully.
The literal meaning of a blueprint is a paper — which is blue — with plans for a building printed on it. You can also call other guides or plans blueprints. The way you do your homework every night could provide a blueprint for your little sister’s study habits. A business plan is a blueprint for a profitable business. Religions and philosophies provide the blueprint for many people’s lives. A blueprint helps you figure out what to do.