Aboard
Definition 1 of 3
Pro Tip 1/3
Transportation Context
Used when someone is getting on transportation or already inside it. She stepped aboard the airplane just in time.
Pro Tip 2/3
Embarking Journey
'Aboard' implies beginning a journey or travel. The passengers were aboard and ready for departure.
Pro Tip 3/3
Welcome Gesture
Often used to welcome someone onto transportation or into a group. The captain welcomed everyone aboard.