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blueprint

BLOO-print /ˈbluː.prɪnt/

nounverbB2TOEFLIELTSSAT

generaltechnicalmetaphorical

A detailed technical drawing or architectural plan; metaphorically, a comprehensive guide or plan of action.

Literally refers to cyanotype technical prints; broadly used to denote any structured master plan.

The story behind the word. Introduced in 1842 by Sir John Herschel, the blueprint process used photosensitive chemicals that turned Prussian blue when exposed to light, leaving dark drafting lines stark white. The word transitioned from engineering drawing rooms into general English as a metaphor for any meticulous plan.

Word relationships

schematic: Focuses on technical diagrams showing electrical or mechanical connections rather than overall spatial layout.
design: Broader and less specific than a formal blueprint.

improvisation: Refers to acting without a detailed plan.

Commonly confused with

prototype: A prototype is a physical working model, whereas a blueprint is a two-dimensional plan or drawing.

Word family

blueprinted (verb): Designed or mapped out according to a plan.

Collocations

master blueprint
blueprint for success
architectural blueprint
lay out a blueprint

Idioms & expressions

a blueprint for action

Example sentences

"The lead architect examined the blueprint carefully before signing off on the foundation pouring." Architectural Design
"The policy proposal serves as a blueprint for sustainable urban development over the next decade." Strategic Planning

Memory hook

Think of blue paper with precise white lines guiding builders to print a giant structure. Blue paper, clear plan.

When not to use

Do not use for informal or vague ideas without structure.

Fun facts

Original blueprints were blue because light passed through translucent paper and converted iron chemicals on the bottom sheet into deep blue Prussian pigment.