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We found 33 dictionaries with English definitions that include the word prolong:
Click on the first link on a line below to go directly to a page where "prolong" is defined.

General (29 matching dictionaries)

1. prolong: Merriam-Webster.com [home, info]
2. prolong: Oxford Learner's Dictionaries [home, info]
3. prolong: American Heritage Dictionary of the English Language [home, info]
4. prolong: Collins English Dictionary [home, info]
5. prolong: Vocabulary.com [home, info]
6. prolong: Macmillan Dictionary [home, info]
7. Prolong, prolong: Wordnik [home, info]
8. prolong: Cambridge Advanced Learner's Dictionary [home, info]
9. prolong: Wiktionary [home, info]
10. prolong: Webster's New World College Dictionary, 4th Ed. [home, info]
11. prolong: V2 Vocabulary Building Dictionary [home, info]
12. prolong: The Wordsmyth English Dictionary-Thesaurus [home, info]
13. prolong: Infoplease Dictionary [home, info]
14. Prolong, prolong: Dictionary.com [home, info]
15. prolong: Online Etymology Dictionary [home, info]
16. prolong: UltraLingua English Dictionary [home, info]
17. prolong: Cambridge Dictionary of American English [home, info]
18. Prolong: Online Plain Text English Dictionary [home, info]
19. prolong: Webster's Revised Unabridged, 1913 Edition [home, info]
20. prolong: Rhymezone [home, info]
21. prolong: AllWords.com Multi-Lingual Dictionary [home, info]
22. prolong: Webster's 1828 Dictionary [home, info]
23. prolong: Free Dictionary [home, info]
24. prolong: Mnemonic Dictionary [home, info]
25. prolong: WordNet 1.7 Vocabulary Helper [home, info]
26. prolong: LookWAYup Translating Dictionary/Thesaurus [home, info]
27. prolong: Dictionary/thesaurus [home, info]

Art (1 matching dictionary)

28. prolong: The Organon: A Conceptually Indexed Dictionary (by Genus and Differentia) [home, info]

Business (1 matching dictionary)

29. prolong: Legal dictionary [home, info]

Computing (1 matching dictionary)

30. prolong: Encyclopedia [home, info]

Slang (1 matching dictionary)

31. prolong: Urban Dictionary [home, info]

(Note: See prolongs for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (prolong) ▸ verb:  lengthen or extend in duration or space ("Prolong the treatment of the patient") ▸ verb:  lengthen in time; cause to be or last longer ("We prolonged our stay") ▸ Also see prolongs ▸ Word origin ▸ Words similar to prolong ▸ Usage examples for prolong ▸ Idioms related to prolong (New!) ▸ Words that often appear near prolong ▸ Rhymes of prolong ▸ Invented words related to prolong