*flat² n 1 [C] BrE a set of rooms for someone to live in, that is part of a larger building 【英】 一套住宅; 一套公寓房; APARTMENT AmE 【美】: They live in a flat just off Russell Square. 他们住在拉塞尔广场旁的公寓里。 a block of flats (=a large building with many flats in it) 一幢公寓楼 2 [C] a tyre that does not have enough air inside it 漏了气的轮胎 3 the flat of the flat part or side of something …的平坦部分: David hit the desk with the flat of his hand. 大卫用手掌拍桌子。