a.

1. 輕薄的，輕佻的
   He made some frivolous remarks.

   他說了些輕佻話。

2. 無聊的，瑣碎的[+to-v]
   He spent a lot of his money on frivolous things.

   他在一些無聊的事上花了好多錢。

   It was frivolous of him to make such an accusation.

   他提出這樣的指控真無聊。

adj.