vacuous

[vak-yoo-uhs]
adjective
1.
without contents; empty: the vacuous air.
2.
lacking in ideas or intelligence: a vacuous mind.
3.
expressing or characterized by a lack of ideas or intelligence; inane; stupid: a vacuous book.
4.
purposeless; idle: a vacuous way of life.

Origin:
1645–55; < Latin vacuus empty; see -ous

vacuously, adverb
vacuousness, noun
nonvacuous, adjective
nonvacuously, adverb
nonvacuousness, noun
unvacuous, adjective
unvacuously, adverb
unvacuousness, noun

vacant, vacuous, vapid.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
vacuous (ˈvækjʊəs)
 
adj
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, 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]
 
'vacuously
 
adv
 
'vacuousness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

vacuous
1648, "empty," from L. vacuus "empty, void, free" (see vacuum). Figurative sense of "empty of ideas" is from 1848.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
And despite this somewhat overly simple and circular criterion, it is not vacuous.
It's an overly simple and circular criterion, but it isn't vacuous.
Then it becomes emptiness, transforming people into vacuous ghosts of who they used to be.
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