: carried within or occurring aboard a vehicle (such as a satellite or an automobile)
an onboard computer
onboard recorders

on board

2 of 2

phrase

1
: aboard
2
: in support of a particular objective
needed to get more senators on board for the bill to pass

Examples of onboard in a Sentence

Adjective The car comes with an onboard computer.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
Operators deployed them in sequence before handing control to their onboard autonomous systems. — Aamir Khollam, Interesting Engineering, 29 Sep. 2026 The capsule failed to meet up with the orbiting lab, however; it got stranded in the wrong orbit after suffering problems with its onboard timing system. — Mike Wall, Space.com, 28 Sep. 2026
Phrase
Sitting in one of the ship’s myriad bars and talking to strangers is one of the most interesting, and often lovely, things a person can do on board. — Condé Nast, Condé Nast Traveler, 6 Oct. 2026 The commercial flight had 172 people on board, according to the airline, the majority of whom were Israeli. — Kat Lonsdorf, NPR, 5 Oct. 2026 See All Example Sentences for onboard

Word History

First Known Use

Adjective

1958, in the meaning defined above

Time Traveler
The first known use of onboard was in 1958

Browse Nearby Words

Cite this Entry

“Onboard.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/onboard. Accessed 6 Oct. 2026.

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