ADJ-GRADED 輕浮的;見異思遷的;反複無常的 If you say that someone is flighty, you disapprove of them because they are not very serious or reliable and keep changing from one activity, idea, or partner to another. 輕浮的;見異思遷的;反複無常的 [disapproval]
Isabelle was a frivolous little fool, vain and flighty.