Onboard

//ɑnˈbɔɹd// adj, adv, verb

adj, adv, verb ·Uncommon ·Advanced level

Definitions

Verb
  1. 1
    To become a part of a group; to incorporate (someone) into a group. figuratively

    "It's easiest to onboard and offboard employees if you have a checklist to follow."

  2. 2
    To begin to use a product or service; to take (someone) on as a new customer of a product or service. figuratively
Adjective
  1. 1
    Carried or used on or in a vehicle or vessel. not-comparable

    "Swinging onto the Treherbert branch under the new OLE, the train's onboard Passenger Information Screens announce we have entered a 'no alcohol' zone. That doesn't seem to help, as some of the passengers who joined us earlier seem 'well oiled' already."

  2. 2
    Being a part of, being included in, participating in. broadly, figuratively, not-comparable

    "When it comes to security, everybody seems to be as onboard as I am."

Adverb
  1. 1
    On or in a vehicle or vessel; aboard; on board. not-comparable

Synonyms

All synonyms
aboard

Example

More examples

"Please say a prayer for those who were onboard."

Etymology

From on board, equivalent to on- + board.

Related phrases

on board

More for "onboard"

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Related Topic Clusters

Product and UX Writing Vocabulary

Interface and product-copy language for onboarding, errors, and feature guidance.

Next best steps

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.