a central airport, station, etc. that operates many services 中央機場、車站等，提供多種服務 The airport has become an international hub. 該機場已成爲國際樞紐。 It's the city's major transportation hub for bus and rail. 這是該市公共汽車和鐵路的主要交通樞紐。 Major hub airports have grown up all over the world. 全球各大樞紐機場紛紛崛起。
- [usually singular] hub (of something)
the central and most important part of a particular place or activity （某地或活動的）中心，核心 the commercial hub of the city 城市的商業中心 The kitchen was the hub of family life. 廚房是家庭生活的中心。 to be at the hub of things (= where things happen and important decisions are made) 在核心部門
the central part of a wheel 輪毂 
Word Originearly 16th cent. (denoting a shelf at the side of a fireplace used for heating pans): of unknown origin (compare with hob).