英語 高校生 4年以上前

2番のget on board the planeのboardはどういう意味ですか？boardを抜いてget on the planeとは何が違いますか？

(2) The premier, waving his hand, got on board the plane. (3) Feeling very tired, I went to bed early. TATritton in hacte hie renort has a lot of misspellings.