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Houghton Mifflin

vac·u·ous  audio  (vky-s) KEY 

ADJECTIVE:
  1. Devoid of matter; empty.
    1. Lacking intelligence; stupid.
    2. Devoid of substance or meaning; inane: a vacuous comment.
    3. Devoid of expression; vacant: "The narrow, swinelike eyes were open, no more vacuous in death than they had been in life" (Nicholas Proffitt).
  2. Lacking serious purpose or occupation; idle. See Synonyms at empty.

ETYMOLOGY:
From Latin vacuus, empty ; see vacuum

OTHER FORMS:
vacu·ous·ly(Adverb), vacu·ous·ness(Noun)


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