Blue print Meaning, Definition & Usage

Definitions

1. a copy in white lines on a blue ground, of a drawing, plan, tracing, etc., or a positive picture in blue and white, from a negative, produced by photographic printing on peculiarly prepared paper. also blueprint. Long used for reproduction of architectural drawings, now also applied to an architectural plan of any color, and thus (Fig.) a plan, or outline of a plan of action; as, blueprint for action