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We found 34 dictionaries with English definitions that include the word porthole:
Click on the first link on a line below to go directly to a page where "porthole" is defined.

General (29 matching dictionaries)

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

Business (1 matching dictionary)

28. porthole: Travel Industry Dictionary [home, info]

Computing (1 matching dictionary)

29. porthole: Encyclopedia [home, info]

Slang (1 matching dictionary)

30. porthole: Urban Dictionary [home, info]

Tech (2 matching dictionaries)

31. Porthole: AUTOMOTIVE TERMS [home, info]
32. porthole: SeaTalk Dictionary of English Nautical Language [home, info]

(Note: See portholes for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (porthole) ▸ noun:  a window in a ship or airplane ▸ noun:  an opening (in a wall or ship or armored vehicle) for firing through ▸ Also see portholes ▸ Word origin ▸ Words similar to porthole ▸ Usage examples for porthole ▸ Idioms related to porthole (New!) ▸ Popular adjectives describing porthole ▸ Words that often appear near porthole ▸ Rhymes of porthole ▸ Invented words related to porthole