[vak-yoo-uh s]


without contents; empty: the vacuous air.
lacking in ideas or intelligence: a vacuous mind.
expressing or characterized by a lack of ideas or intelligence; inane; stupid: a vacuous book.
purposeless; idle: a vacuous way of life.

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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for non-vacuous



containing nothing; empty
bereft of ideas or intelligence; mindless
characterized by or resulting from vacancy of minda vacuous gaze
indulging in no useful mental or physical activity; idle
logic maths (of an operator or expression) having no import; idle: in (x) (John is tall) the quantifier (x) is vacuous
Derived Formsvacuously, adverbvacuousness, noun

Word Origin for vacuous

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



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

Online Etymology Dictionary, © 2010 Douglas Harper