1long, flat, thin pieces of wood used to build or cover something.
2the arrangement according to which pupils live in school during term time:the advantages of boarding [as modifier]:students all had to pay boarding fees
3the action of getting on or into a ship, aircraft, or other vehicle:remember to buy your tickets before boarding
4 Ice Hockey the illegal action of body-checking an opponent violently into the boards from behind.
boarding in other Oxford dictionaries
Definition of boarding in the US English dictionary
