big /biɡ/ I. adj.1. 大的：a big tree 大树; a big business 大企业; a big boy 大孩子 The shirt is too big for me.这衬衣我穿太大了。2.重要的，重大的：He is a big man.他是个大人物。 ‖II.adv. 雄心勃勃地。Think big.雄心勃勃，志向远大。You need to think big. 你要敢想。