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a. Lacking intelligence; stupid or empty-headed.
b. Devoid of substance or meaning; vapid or inane: a vacuous comment.
c. Devoid of expression; vacant: a vacuous stare. See Synonyms at empty.
2. Lacking serious purpose or occupation; idle: "A sleepless night was followed by a vacuous day" (Zon Ferraris).
3. Archaic Devoid of matter; empty: vacuous space.
[From Latin vacuus, empty; see vacuum.]
1. containing nothing; empty
2. bereft of ideas or intelligence; mindless
3. characterized by or resulting from vacancy of mind: a vacuous gaze.
4. indulging in no useful mental or physical activity; idle
5. (Logic) logic maths (of an operator or expression) having no import; idle: in (x) (John is tall) the quantifier (x) is vacuous
6. (Mathematics) logic maths (of an operator or expression) having no import; idle: in (x) (John is tall) the quantifier (x) is vacuous
[C17: from Latin vacuus empty, from vacāre to be empty]
vac•u•ous(ˈvæk yu əs)
2. lacking in or showing a lack of ideas or intelligence: a vacuous mind.
3. purposeless; idle.
[1645–55; < Latin vacuus empty]
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|Adj.||1.||vacuous - devoid of intelligence|
foolish - devoid of good sense or judgment; "foolish remarks"; "a foolish decision"
|2.||vacuous - devoid of significance or point; "empty promises"; "a hollow victory"; "vacuous comments"|
|3.||vacuous - devoid of matter; "a vacuous space"|
empty - holding or containing nothing; "an empty glass"; "an empty room"; "full of empty seats"; "empty hours"
|4.||vacuous - void of expression; "a blank stare"|