English Reference

Word

onboard

Phoneticson·board, stress on the first syllable

/ˈɑnˌbɔɹd/

Definitions

01to integrate a new employee

B2 · Upper Intermediate Academic · Formal

v. to help a new employee start their job by giving them the training and tools they need.

v. to integrate a new employee into an organisation through training and orientation. Transitive — takes the person being integrated as the object.

“The company will onboard five new engineers next Monday morning.”

“The human resources department has developed a comprehensive digital portal to onboard remote employees more efficiently during the first week of their contract.”

Usage

Often used in corporate environments to describe the formal process of hiring and training.

Antonyms

offboard

02to sign up a new customer

B2 · Upper Intermediate Computing Technical

v. to help a new customer or user start using a product or service.

v. to facilitate the initial experience of a new user or client with a product, service, or platform.

“The app makes it very easy to onboard new users in just two minutes.”

“The fintech startup focused on reducing friction when they onboard new clients to ensure a higher retention rate during the trial period.”

Synonyms

03located inside a vehicle

B2 · Upper Intermediate

adj. available or located inside a car, plane, ship, or other vehicle.

adj. situated or carried within a vehicle, vessel, or aircraft. Usually placed before the noun.

“Most modern cars come with an onboard navigation system.”

“The aircraft is equipped with sophisticated onboard diagnostics that alert the ground crew to potential mechanical issues before the plane even lands.”

Synonyms

Antonyms

04on a vehicle

B2 · Upper Intermediate American English · Technical

adv. on or inside a vehicle or ship.

adv. positioned on or within a vehicle or vessel. Often written as two words ('on board') in general contexts, but 'onboard' is common in technical or American English usage.

“The captain welcomed the passengers as they came onboard.”

“Once all the cargo was safely secured onboard, the vessel began its journey across the Atlantic.”

Synonyms

Antonyms

Real-World Examples

“It said there were seven people onboard – six passengers and the pilot.”
The Guardian 19 Aug 2026
“But it's short range, so the company also plans to add AI-powered cameras, its first real use of AI onboard.”
BBC News 1 Sept 2026

Etymology

From on board, equivalent to on- + board.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

VERB

onboard(B2)

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Frequent
Level
B2 · Upper Intermediate
Updated

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English Reference