To step or climb onto or otherwise enter a ship, aircraft, train or other conveyance.
It is time to board the aircraft.
To provide someone with meals and lodging, usually in exchange for money.
to board one's horse at a livery stable
To receive meals and lodging in exchange for money.
To capture an enemy ship by going alongside and grappling her, then invading her with a boarding party
To obtain meals, or meals and lodgings, statedly for compensation
To approach (someone); to make advances to, accost.
To cover with boards or boarding.
to board a house
To hit (someone) with a wooden board.
To write something on a board, especially a blackboard or whiteboard.
(of a structure, such as a roof, window, etc.) wooden, built with pieces of wood