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We found 44 dictionaries with English definitions that include the word pentagon:
Click on the first link on a line below to go directly to a page where "pentagon" is defined.

General (31 matching dictionaries)

1. Pentagon, pentagon, the Pentagon, the pentagon: Merriam-Webster.com [home, info]
2. pentagon, the Pentagon: Oxford Learner's Dictionaries [home, info]
3. pentagon: American Heritage Dictionary of the English Language [home, info]
4. pentagon: Collins English Dictionary [home, info]
5. Pentagon, pentagon: Vocabulary.com [home, info]
6. pentagon, the Pentagon: Macmillan Dictionary [home, info]
7. Pentagon, pentagon: Wordnik [home, info]
8. pentagon, the Pentagon, the pentagon: Cambridge Advanced Learner's Dictionary [home, info]
9. Pentagon, pentagon: Wiktionary [home, info]
10. pentagon: Webster's New World College Dictionary, 4th Ed. [home, info]
11. pentagon: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. pentagon: Infoplease Dictionary [home, info]
13. Pentagon, the pentagon: Dictionary.com [home, info]
14. pentagon: Online Etymology Dictionary [home, info]
15. Pentagon, pentagon: UltraLingua English Dictionary [home, info]
16. pentagon: Cambridge Dictionary of American English [home, info]
17. Pentagon (Brussels), Pentagon (EP), Pentagon (Japanese band), Pentagon (South Korean band), Pentagon (TV series), Pentagon (USA), Pentagon (United States), Pentagon (Washington Metro), Pentagon (Wiesbaden), Pentagon (band), Pentagon (building), Pentagon (computer), Pentagon (disambiguation), Pentagon (military), Pentagon (novel), Pentagon (shape), Pentagon, The Pentagon (album), The Pentagon, The pentagon: Wikipedia, the Free Encyclopedia [home, info]
18. Pentagon: Online Plain Text English Dictionary [home, info]
19. pentagon: Webster's Revised Unabridged, 1913 Edition [home, info]
20. Pentagon: Rhymezone [home, info]
21. Pentagon: AllWords.com Multi-Lingual Dictionary [home, info]
22. pentagon: Webster's 1828 Dictionary [home, info]
23. pentagon: Hutchinson's Dictionary of Difficult Words [home, info]
24. pentagon: Free Dictionary [home, info]
25. pentagon: Hutchinson Dictionaries [home, info]
26. pentagon: Mnemonic Dictionary [home, info]
27. pentagon: WordNet 1.7 Vocabulary Helper [home, info]
28. Pentagon, pentagon: LookWAYup Translating Dictionary/Thesaurus [home, info]
29. pentagon: Dictionary/thesaurus [home, info]

Art (2 matching dictionaries)

30. pentagon: ArtLex Lexicon of Visual Art Terminology [home, info]
31. Pentagon: Natural Magick [home, info]

Business (1 matching dictionary)

32. Pentagon: Construction Term Glossary [home, info]

Computing (1 matching dictionary)

33. Pentagon (shape), pentagon: Encyclopedia [home, info]

Medicine (1 matching dictionary)

34. pentagon: online medical dictionary [home, info]

Miscellaneous (3 matching dictionaries)

35. pentagon: Encyclopedia of Graphic Symbols [home, info]
36. Pentagon: Glossary of Terrorism Terms [home, info]
37. PENTAGON: Third Eye's Paranormal [home, info]

Science (3 matching dictionaries)

38. Pentagon: Eric Weisstein's World of Mathematics [home, info]
39. pentagon: MATH SPOKEN HERE! [home, info]
40. pentagon: PlanetMath Encyclopedia [home, info]

Slang (2 matching dictionaries)

41. Pentagon: Totally Unofficial Rap [home, info]
42. Pentagon: Urban Dictionary [home, info]

(Note: See pentagons for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (Pentagon) ▸ noun:  a government building with five sides that serves as the headquarters of the United States Department of Defense ▸ noun:  the United States military establishment ▸ noun:  a five-sided polygon ▸ Also see pentagons ▸ Word origin ▸ Words similar to pentagon ▸ Usage examples for pentagon ▸ Idioms related to pentagon (New!) ▸ Popular adjectives describing pentagon ▸ Words that often appear near pentagon ▸ Rhymes of pentagon ▸ Invented words related to pentagon