1. 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.
2. A mechanical drawing produced by any of various similar photographic processes, such as one that creates blue or black lines on a white background.
3. A detailed plan of action. See synonyms at plan.
4. A model or prototype.

1. To make a blueprint of.
2. To lay a plan for.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.