If there is a whiff of a particular smell, you smell it only slightly or only for a brief period of time, for example as you walk past someone or something.
例句
He caught a whiff of her perfume.他闻到了她身上的一股香水味。
N-COUNT
轻微的征兆;迹象
A whiff of something bad or harmful is a slight sign of it.
例句
Not a whiff of scandal has ever tainted his private life...他的私生活没有爆出过一丁点儿的丑闻。The TV show had the whiff of hypocrisy and pomposity.这个电视节目有些伪善和夸耀的嫌疑。