We found 30 dictionaries that define the word ostentation:

General (26 matching dictionaries)

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

Art (1 matching dictionary)

25. Shakespeare Glossary (No longer online)

Business (1 matching dictionary)

26. ostentation: Legal dictionary

Computing (1 matching dictionary)

27. ostentation: Encyclopedia

Medicine (1 matching dictionary)

28. online medical dictionary (No longer online)

(Note: See ostentations as well.)

Definitions from Wiktionary ( ) ▸ noun:  Ambitious display; vain show; display intended to excite admiration or applause. ▸ noun:  (obsolete) A show or spectacle. Similar: ostentatiousness, pompousness, pomposity, pretentiousness, splashiness, fanfare, ostent, vainglory, deediness, peacockery, more... Opposite: modesty, simplicity, unpretentiousness, plainness, humility Types: bling, flashiness, showiness, extravagance, ostentatiousness, pretentiousness, grandiosity, excessiveness, more... Phrases: with ostentation, crude ostentation, more... Adjectives: vulgar, much, greater, such, vain, little, mere, certain, personal, unnecessary, pure Colors:     gold,     silver,     crimson,     emerald,     sapphire, more... ▸ Word origin ▸ Words similar to ostentation ▸ Usage examples for ostentation ▸ Idioms related to ostentation ▸ Wikipedia articles (New!) ▸ Popular adjectives describing ostentation ▸ Words that often appear near ostentation ▸ Rhymes of ostentation ▸ Invented words related to ostentation