1 one of the things that influences a decision, situation, etc 起因;缘由;因素:
His unhappiness at home was a major factor in his decision to go abroad.在家里郁郁不乐是他决定到国外去的一大原因。
2 (technical术语) (in mathematics) a whole number (except 1) by which a larger number can be divided (数学)因子,因子:
2, 3, 4 and 6 are factors of 12.2、3、4、6都是12的因子。