Webster's English Dictionary

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vacuous

Cross references:
  1. empty                 
 
vac.u.ous \'vak-y*-w*s\ aj [L vacuus] 1: EMPTY  2: marked by lack of ideas 
   or intelligence : STUPID, INANE <(~ mind ~ expression} 3: devoid of serious 
   occupation : IDLE  - vac.u.ous.ly av