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vacuous

adjective

/ˈvækjuəs/

Meaning

Having or showing a lack of thought or intelligence; mindless.

She gave a vacuous smile during the serious discussion.

vacuous expression

empty, foolish, silly, mindless, hollow

thoughtful, intelligent, meaningful

vacuous smile, vacuous stare, vacuous remark, vacuous expression

having qualities traditionally associated with men; brave; courageous

Making or characterized by a hissing sound.

using very few words; concise to the point of seeming rude or mysterious

Having knowledge or being aware of; conscious and informed about something.

awaiting; not yet decided or settled; in the process of being completed

Able to be noticed or recognized by the senses or the mind.