onboard

Etymology

It is formed from English on- + board,^[2] or, as most dictionaries put it, it is the adverbial phrase on board used as an adjective.^[3][4][5][6] Board in this phrase is the side of a ship, from Old English bord.^[7]

Earliest recorded meaning

That is on board a ship, aircraft or spacecraft: 1958, in the journal Science.^[2][4] Etymonline dates the one-word form to 1966, originally of spaceships,^[3] Merriam-Webster's Collegiate to 1960,^[8] and Dictionary.com to 1965–70.^[6]

Semantic evolution

From spacecraft and aircraft the adjective spread to any vehicle, as in onboard computer.^[4][3] In computing it was used from 1979 of a feature built into a computer's main circuit board, then from 1988 of any feature built into a device rather than added on.^[2][4] The phrase on board also gained the figurative senses "on the job" and "in support of an aim", and in 2009 Grammarphobia noted that onboard was being used for them as well, although dictionaries listed those senses only under the phrase.^[9] The derivative onboarding, the process of bringing a new employee into an organization, is recorded from 1990, and for familiarizing a new customer with a product from 1997.^[2]

Timeline

• 1958 – on board a ship, aircraft or spacecraft.^[2][4]
• 1966 – Etymonline's first record of the one-word form, of spaceships.^[3]
• 1979 – in computing, built into the main circuit board.^[2]
• 1988 – built into a device rather than added on.^[2]
• 1990 – onboarding, integrating a new employee.^[2]

Meanings

Adjective

1. Carried, used or occurring aboard a vehicle, vessel, aircraft or spacecraft: The car's onboard navigation system failed.^{[4][10][11][2]}
2. Built-in; in computing, located on the main circuit board of a device.^[2][4]

Adverb

1. Into or onto a ship or other craft; aboard.^[11][1]

Verb

1. To bring a new employee into an organization, or a new customer into using a product or service.^[1] The noun onboarding in these senses is in the OED.^[2]

Related words

• aboard
• outboard
• overboard
• board
• onboarding

References

1. ^ a b c d 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 Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
4. ^ a b c d e f g Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
5. ^ Gove, Philip Babcock, ed. (1961), Webster's Third New International Dictionary of the English Language, Unabridged, Springfield, Mass.: G. & C. Merriam
6. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
7. ^ The Chambers Dictionary (2014), 13th ed., Edinburgh: Chambers
8. ^ Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster
9. ^ O'Conner, Patricia T.; Kellerman, Stewart, The Grammarphobia Blog, grammarphobia.com, p. "Are the lexicographers on board?", 16 May 2009
10. ^ The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin
11. ^ a b Collins English Dictionary (2023), Glasgow: HarperCollins