thus/ðʌs; ðʌs/adv formal 【正式】1 as a result of something that you have just mentioned [ so ] 因此﹐因而﹐于是: Traffic will become heavier, thus increasing pollution. 交通将变得更拥挤﹐因而加重污染。2 in this way or like this 以此种方式﹔如此﹐这样: Thus began one of the darkest periods in the country's history. 该国历史上最黑暗的一个时期就这样开始了。