- A contact print of a drawing or other image rendered as white lines on a blue background, especially such a print of an architectural plan or technical drawing. Also called cyanotype.
- A mechanical drawing produced by any of various similar photographic processes, such as one that creates blue or black lines on a white background.
- A detailed plan of action. See Synonyms at plan.
- A model or prototype.
- To make a blueprint of.
- To lay a plan for.