Synonyms of 'vacuous'
showing no sign of intelligence or understandingthe usual vacuous comments from the chat-show host
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in the sense of blank
showing no interest or expression
He gave him a blank look.
in the sense of inane
senseless or silly
He always had this inane grin.
in the sense of stupid
trivial, silly, or childish
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