n [U] (structure made of) boards(board11) 木板（建造之物）.
the act of getting on a ship, plane etc in order to travel somewhere
Boarding is now taking place at Gate 38.
narrow pieces of wood that are fixed side by side, usually to cover a broken door or window
1. He is optimistic that once parents make a commitment to the program, they will be daily role models for their children, unlike parents whose children are in boarding schools. 他很乐观地相信，一旦家长们投入到计划当中，他们就会成为孩子们日常行为的榜样，这一点与寄宿学校的学生家长完全不同。
2. Passengers checked their baggage before boarding the plane. 旅客上飞机前托运了行李。