What is the meaning of Blueprint?

A type of paper-based reproduction process producing white-on-blue images by means of a photosensitive ferric compound, used primarily for technical and architecture's drawings, now largely replaced by other technologies.

A print produced with this process.

A detailed technical drawing (now often in some electronically storable and transmissible form).

Any detailed plan, whether literal or figurative.

To make a blueprint for.

To make a detailed operational plan for; to design or plan out.

Source: wiktionary.org