vacuously adverb - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com.
What is vacuousness?
1 : emptied of or lacking content. 2 : marked by lack of ideas or intelligence : stupid, inane a vacuous mind a vacuous movie.
Is vacuous an adjective?
VACUOUS (adjective) definition and synonyms | Macmillan Dictionary.