blueprint

Etymology

It is formed from English blue + print,^[2][3][4][5] from the process that produced prints of white lines on a blue ground, or blue lines on a white one.^[6][3]

Earliest recorded meaning

A photographic print of white lines on a blue background, used for copying plans and drawings: 1857, in Photographic Notes.^[2][4] Etymonline dates it to 1882,^[3] and Dictionary.com to 1885–90.^[5]

Semantic evolution

The blueprint was the standard way of copying architects' plans and engineering drawings,^[4][7] and the word passed from the copy to the plan itself.^[2] The figurative sense, a detailed plan or model for something, is recorded from 1910,^[2][8] 1926 in Etymonline.^[3] The verb, to draw up a blueprint for or plan in detail, is recorded from 1889,^[2][8] or from 1884 according to Merriam-Webster,^[4] and Etymonline dates it by 1939.^[3] In motoring, to blueprint an engine is to rebuild it as close as possible to its exact design specifications.^[4]

Timeline

• 1857 – a photographic print of white lines on a blue ground.^[2]
• 1889 – verb, to make a blueprint for; to plan out.^[2]
• 1910 – figuratively, a plan, model or template.^[2]

Meanings

Noun

1. A photographic print of plans or technical drawings, with white lines on a blue background: the architect's blueprints for the station.^[7][4][2]
2. A detailed plan or programme, or a model that later work follows: The treaty became a blueprint for later trade agreements.^[7][4][2]

Verb

1. To make a blueprint of; to plan something out in detail.^[7][4][2]
2. In motoring, to rebuild an engine exactly to its design specifications.^[4]

Word family

• blueprinter

Related words

• cyanotype

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i j k Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
4. ^ a b c d e f g h i Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
5. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
6. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
7. ^ a b c d Collins English Dictionary (2023), Glasgow: HarperCollins
8. ^ a b Kay, Christian; Roberts, Jane; Samuels, Michael; Wotherspoon, Irené, eds. (2009), Historical Thesaurus of the Oxford English Dictionary, Oxford: Oxford University Press; online edition (2024)