aboard adverb - Definition, pictures, pronunciation and usage …
https://www.oxfordlearnersdictionaries.com/us/definition/american_english/aboard
Webadverb, preposition. /əˈbɔrd/ on or onto a ship, plane, bus, or train synonym on board We went aboard. He was already aboard the plane. The plane crashed, killing all 157 passengers aboard. All aboard! (= the bus, boat, etc. is leaving soon) Welcome aboard! (= used to welcome passengers or a person joining a new organization, etc.)
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