Synonyms of 'vacuous'
1 vapidDictionary, stupid, inanethe usual vacuous comments from the chat-show host
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He gave him a blank look.
If you describe someone's behaviour or actions as inane, you think they are very silly or stupid.
He always had this inane grin.
You say that something is stupid to indicate that you do not like it or care about it, or that it annoys you.
I wouldn't call it art. It's just stupid and tasteless.
You won't go and do anything stupid, will you?
Thesaurus for vacuous from the Collins English Thesaurus
If you describe a person or their comments as vacuous , you are critical of them because they lack intelligent thought or ideas.