A type of paper-based reproduction process producing white-on-blue images, used primarily for technical and architecture's drawings, now largely replaced by other technologies.
(architecture,engineering,by extension) A detailed technical drawing (now often in some electronically storable and transmissible form).
(informal,by extension) Any detailed plan, whether literal or figurative.
2018, Jhariah Clare (lyrics and music), “City of Ashes”, in The Great Tale of How I Ruined it All:
Ain't got no blueprint, just a purpose and a wrecking ball!
2020 December 2, Christian Wolmar, “Wales offers us a glimpse of an integrated transport strategy”, in Rail, page 56:
This demonstrated serious intent, and the result is a report that should be a blueprint for subsequent assessments when road schemes are being put forward.
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