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1. A construction plan. It is called a blueprint because it historically has been printed on blue paper with white lines.

2. In photography, a copy of a periodical printed before final editing in which images are shown on blue paper.

3. Informal, a plan.


A detailed set of plans used as a guide for construction.Because of the economies of a very inexpensive method of creating and copying such plans, they were formerly characterized by white lines on blue paper.

References in periodicals archive ?
BlueLine Grid joins Motorola Solutions growing network of investments in new technologies that are contributing to smart public safety solutions that create the safer cities of the future.
While initial reports have compared BlueLine to Facebook, company officials say it will more closely resemble popular social media business-oriented sites like LinkedIn.
Blueline buses have been operating in the metropolis for the past two decades.
The Silverline and Blueline are equipped with an impressive package of standard equipment, including 14" alloy wheels, leather-wrapped steering wheel, electric front windows and RDS radio/single CD player, along with remote central locking and driver and front passenger airbags.
The Octavia Silverline and Blueline hatchback costs pounds 12,475 for the 1.
However, Blueline won't be folded into Boro Cars' massive fleet, with bosses vowing to let the firm continue to trade independently.
Lee Clayton, operations director at Blueline Taxis, said: "Blueline Taxis are immensely proud to once again take part in the North East Charity Awards.
Nurses from the Niall Quinn Children's Centre in Sunderland asked Cash for Kids for help, and Blueline stepped up to offer the family transport to Butlins free of charge.
A full-service equipment rental firm, BlueLine Rental, has announced that it has completed its deal to acquire Trico Equipment Inc.
THE Delhi government will soon re- introduce over 1,500 ' controversial' Blueline buses on Capital roads covering around 100 routes.
A RUN through of the Ormskirk League starts in Division Three as the highest scoring game of the day saw Blueline grab the points from Rainford winning 7-5.