We found 36 dictionaries that define the word was:

General (25 matching dictionaries)

1. was: Merriam-Webster.com
2. Was, was: Oxford Learner's Dictionaries
3. was: American Heritage Dictionary of the English Language
4. was: Collins English Dictionary
5. was: Vocabulary.com
6. WA's, Was, wa's, was, was, was, was, was, was: Wordnik
7. was: Cambridge Advanced Learner's Dictionary
8. was: Wiktionary
9. was: Webster's New World College Dictionary, 4th Ed.
10. was: The Wordsmyth English Dictionary-Thesaurus
11. was: Infoplease Dictionary
12. WAS: Dictionary.com
13. was: Online Etymology Dictionary
14. was: Cambridge Essential American English Dictionary
15. WAS, Was (Not Was), Was (Not Was) (album), Was (horse), Was (novel), Was (sceptre), Was: Wikipedia, the Free Encyclopedia
16. Was: Online Plain Text English Dictionary
17. was: Webster's Revised Unabridged, 1913 Edition
18. Was, Was, Was, was (de): AllWords.com Multi-Lingual Dictionary
19. was: Webster's 1828 Dictionary
20. WAS: Stammtisch Beau Fleuve Acronyms
21. was: Free Dictionary
22. was: LookWAYup Translating Dictionary/Thesaurus
23. was: Dictionary/thesaurus

Business (2 matching dictionaries)

24. was: Legal dictionary
25. was: Financial dictionary

Computing (1 matching dictionary)

26. WAS (disambiguation), WAS: Encyclopedia

Medicine (1 matching dictionary)

27. was: Medical dictionary

Miscellaneous (5 matching dictionaries)

28. Navajo Code Talkers' Dictionary (No longer online)
29. WAS: Acronym Finder
30. WAS: Three Letter Words with definitions
31. AbbreviationZ (No longer online)
32. was: Idioms

Slang (1 matching dictionary)

33. W.A.S, was, the was: Urban Dictionary

Tech (1 matching dictionary)

34. DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations (No longer online)

(Note: See be as well.)

Definitions from Wiktionary ( ) ▸ verb:  (now colloquial) Used in phrases with existential there when the semantic subject is (usually third-person) plural. ▸ noun:  A surname. Similar: ajar, afoot, aglow, aghast, over, okra, almost, already, another, able, more... Opposite: is, exists, remains, continues, endures Phrases: that was, was going, was at, was on, was born, more... Adjectives: how, what, she, last, much, this, okra, god, above, classic, negative Colors:     blue,     gray,     sepia,     black,     white,     brown,     beige,     olive,     maroon,     teal ▸ Word origin ▸ Words similar to was ▸ Usage examples for was ▸ Idioms related to was ▸ Wikipedia articles (New!) ▸ Popular adjectives describing was ▸ Words that often appear near was ▸ Rhymes of was ▸ Invented words related to was