aboard

1 aboard /əˈboɚd/ adverb
1 aboard
/əˈboɚd/
adverb
Britannica Dictionary definition of ABOARD
: on, onto, or within a train, a ship, an airplane, etc.
◊ All aboard! is a call for passengers to get onto a ship or train because it is ready to leave.
2 aboard /əˈboɚd/ preposition
2 aboard
/əˈboɚd/
preposition
Britannica Dictionary definition of ABOARD
: on or into (a train, ship, etc.)