Real Dictionary

blueprint
countable noun: A blueprint for something is a plan or set of proposals that shows how it is expected to work.
countable noun: A blueprint of an architect's building plans or a designer's pattern is a photographic print consisting of white lines on a blue background. Blueprints contain all of the information that is needed to build or make something.
countable noun: A genetic blueprint is a pattern which is contained within all living cells. This pattern decides how the organism develops and what it looks like.

blueprint in American English
a photographic reproduction in white on a blue background, as of architectural or engineering plans
to make a blueprint of
noun: a process of photographic printing, used chiefly in copying architectural and mechanical drawings, which produces a white line on a blue background
transitive verb: to make a blueprint of or for

blueprint in British English
noun: a photographic print of plans, technical drawings, etc, consisting of white lines on a blue background
verb: to make a blueprint of (a plan)