1aboard 
/əˈboɚd/ adverb
/əˈboɚd/ adverb : on, onto, or within a train, a ship, an airplane, etc.
▪ He climbed aboard just as the train was leaving. ▪ Everyone aboard was injured in the accident. ◊All aboard! is a call for passengers to get onto a ship or train because it is ready to leave.
▪ He climbed aboard just as the train was leaving. ▪ Everyone aboard was injured in the accident. ◊All aboard! is a call for passengers to get onto a ship or train because it is ready to leave.
