frivolous

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

not serious in content or attitude or behavior (Freq. 3)
- a frivolous novel
- a frivolous remark
- a frivolous young woman
• Ant:
serious
• Similar to:
airheaded, dizzy, empty-headed, featherbrained, giddy,
light-headed, lightheaded, silly, flighty, flyaway, head-in-the-clouds,
scatterbrained, flippant, light-minded, idle, light, trivial
• See Also:
superficial
• Derivationally related forms:
frivolousness, frivolity
• Attrubites:
seriousness, earnestness, serious-mindedness, sincerity