We found 20 dictionaries that define the word water under the bridge:

General (15 matching dictionaries)

1. water under the bridge: Merriam-Webster
2. water under the bridge: Oxford Learner's Dictionaries
3. water under the bridge: Collins English Dictionary
4. water under the bridge: Vocabulary.com
5. water under the bridge: Cambridge Advanced Learner's Dictionary
6. water under the bridge: Wiktionary
7. water under the bridge: Dictionary.com
8. Water Under the Bridge (film), Water Under the Bridge (song), Water Under the Bridge: Wikipedia, the Free Encyclopedia
9. water under the bridge: Rhymezone
10. water under the bridge: FreeDictionary.org
11. water under the bridge: Mnemonic Dictionary
12. Water Under The Bridge: A to Z list of the most popular idioms
13. water under the bridge: TheFreeDictionary.com

Business (1 matching dictionary)

14. water under the bridge: Legal dictionary

Computing (1 matching dictionary)

15. water under the bridge: Encyclopedia

Medicine (1 matching dictionary)

16. water under the bridge: Medical dictionary

Miscellaneous (1 matching dictionary)

17. water under the bridge: Idioms

Slang (1 matching dictionary)

18. water under the bridge: Urban Dictionary

Definitions from Wiktionary (water under the bridge) ▸ noun:  (idiomatic) Something in the past that cannot be controlled or undone, but must be accepted, forgiven, or forgotten. Similar: water off a duck's back, water off a duck, unspoken water, still water, backwater, time out of mind, forgotten, uncharted water, dead water, uncharted territory, more... Opposite: unresolved, ongoing, current, relevant, significant Adjectives: distributary, bankfull, wax, tributary, torrent, tided, lead, watershed, neap, ebb, bottom ▸ Words similar to water under the bridge ▸ Usage examples for water under the bridge ▸ Idioms related to water under the bridge ▸ Wikipedia articles (New!) ▸ Words that often appear near water under the bridge ▸ Rhymes of water under the bridge ▸ Invented words related to water under the bridge