We found 31 dictionaries that define the word vacuous:

General (26 matching dictionaries)

1. vacuous: Merriam-Webster.com
2. vacuous: Oxford Learner's Dictionaries
3. vacuous: American Heritage Dictionary of the English Language
4. vacuous: Collins English Dictionary
5. vacuous: Vocabulary.com
6. Vacuous, vacuous: Wordnik
7. vacuous: Cambridge Advanced Learner's Dictionary
8. vacuous: Wiktionary
9. vacuous: Webster's New World College Dictionary, 4th Ed.
10. vacuous: The Wordsmyth English Dictionary-Thesaurus
11. vacuous: Infoplease Dictionary
12. vacuous: Dictionary.com
13. vacuous: Online Etymology Dictionary
14. vacuous: Cambridge Essential American English Dictionary
15. Vacuous: Wikipedia, the Free Encyclopedia
16. Vacuous: Online Plain Text English Dictionary
17. vacuous: Webster's Revised Unabridged, 1913 Edition
18. vacuous: Rhymezone
19. vacuous: AllWords.com Multi-Lingual Dictionary
20. vacuous: Webster's 1828 Dictionary
21. vacuous: Free Dictionary
22. vacuous: Mnemonic Dictionary
23. vacuous: LookWAYup Translating Dictionary/Thesaurus
24. vacuous: Dictionary/thesaurus

Business (1 matching dictionary)

25. vacuous: Legal dictionary

Computing (1 matching dictionary)

26. vacuous: Encyclopedia

Medicine (1 matching dictionary)

27. online medical dictionary (No longer online)

Science (1 matching dictionary)

28. vacuous, vacuous: PlanetMath Encyclopedia

Slang (1 matching dictionary)

29. vacuous: Urban Dictionary

(Note: See vacuously as well.)

Definitions from Wiktionary ( ) ▸ adjective:  Empty; void; lacking meaningful content. ▸ adjective:  Showing a lack of thought or intelligence; vacant. Similar: mindless, meaningless, empty, inane, asinine, fatuous, foolish, hollow, vain, vacuitous, more... Opposite: meaningful, significant, important Types: empty, hollow, void, meaningless, shallow, superficial, insubstantial, pointless, more... Phrases: vacuous quantification, vacuous truth, opposite of vacuous, a female name of vacuous seduction, more... Colors:     beige,     gray,     pale blue,     taupe,     ivory,     pastel pink ▸ Word origin ▸ Words similar to vacuous ▸ Usage examples for vacuous ▸ Idioms related to vacuous ▸ Wikipedia articles (New!) ▸ Popular nouns described by vacuous ▸ Words that often appear near vacuous ▸ Rhymes of vacuous ▸ Invented words related to vacuous