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vacuous

[vak-yoo-uh s]
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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.
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Origin of vacuous

1645–55; < Latin vacuus empty; see -ous
Related formsvac·u·ous·ly, adverbvac·u·ous·ness, nounnon·vac·u·ous, adjectivenon·vac·u·ous·ly, adverbnon·vac·u·ous·ness, nounun·vac·u·ous, adjectiveun·vac·u·ous·ly, adverbun·vac·u·ous·ness, noun
Can be confusedvacant vacuous vapid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for non-vacuous

vacuous

adjective
  1. containing nothing; empty
  2. bereft of ideas or intelligence; mindless
  3. characterized by or resulting from vacancy of minda 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
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Derived Formsvacuously, adverbvacuousness, noun

Word Origin

C17: from Latin vacuus empty, from vacāre to be empty
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for non-vacuous

vacuous

adj.

1640s, "empty," from Latin vacuus "empty, void, free" (see vacuum). Figurative sense of "empty of ideas" is from 1848. Related: Vacuously; vacuousness.

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Online Etymology Dictionary, © 2010 Douglas Harper