board‧ing /ˈbɔːdɪŋ $ ˈbɔːr-/ noun [uncountable]

1. the act of getting on a ship, plane etc in order to travel somewhere:
Boarding is now taking place at Gate 38.

2. narrow pieces of wood that are fixed side by side, usually to cover a broken door or window

[TahlilGaran] Dictionary of Contemporary English ▲