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We found 72 dictionaries with English definitions that include the word mass:
Click on the first link on a line below to go directly to a page where "mass" is defined.

General (36 matching dictionaries)

1. Mass, mass: Merriam-Webster.com [home, info]
2. Mass, Mass, mass, the Mass: Oxford Learner's Dictionaries [home, info]
3. Mass, Mass, mass: American Heritage Dictionary of the English Language [home, info]
4. Mass, mass: Collins English Dictionary [home, info]
5. Mass, mass: Vocabulary.com [home, info]
6. Mass, mass, mass, mass: Macmillan Dictionary [home, info]
7. MAss, Mass, Mass, mass, mass, mass, mass: Wordnik [home, info]
8. Mass, mass: Cambridge Advanced Learner's Dictionary [home, info]
9. Mass, mass: Wiktionary [home, info]
10. mass: Webster's New World College Dictionary, 4th Ed. [home, info]
11. Mass, mass: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. mass: Infoplease Dictionary [home, info]
13. Mass, Mass: Dictionary.com [home, info]
14. mass (1), mass (2): Online Etymology Dictionary [home, info]
15. Mass, mass: UltraLingua English Dictionary [home, info]
16. mass: Cambridge Dictionary of American English [home, info]
17. MASS (decoy system), Mass (Bernstein), Mass (Catholic), Mass (Catholic Church), Mass (English band), Mass (Grotus album), Mass (Liturgy), Mass (Poulenc), Mass (Roman Rite), Mass (Stravinsky), Mass (bach), Mass (disambiguation), Mass (film), Mass (liturgy), Mass (mass spectrometry), Mass (music), Mass (novel), Mass (physics), Mass (religion), Mass (theatre), Mass, The Mass (album), The mass: Wikipedia, the Free Encyclopedia [home, info]
18. Mass: Online Plain Text English Dictionary [home, info]
19. mass: Webster's Revised Unabridged, 1913 Edition [home, info]
20. Mass: Rhymezone [home, info]
21. Mass: E Cobham Brewer, The Reader's Handbook [home, info]
22. Mass, Mass: Dictionary of Phrase and Fable (1898) [home, info]
23. Mass: Encarta® Online Encyclopedia, North American Edition [home, info]
24. Mass: 1911 edition of the Encyclopedia Britannica [home, info]
25. mass: Free Dictionary [home, info]
26. mass: Mnemonic Dictionary [home, info]
27. mass: WordNet 1.7 Vocabulary Helper [home, info]
28. Mass, mass: LookWAYup Translating Dictionary/Thesaurus [home, info]
29. Mass, Mass: Dictionary/thesaurus [home, info]
30. mass: Wikimedia Commons US English Pronunciations [home, info]
31. mass: AllWords.com Multi-Lingual Dictionary [home, info]
32. mass: Webster's 1828 Dictionary [home, info]
33. mass: American Heritage Dictionary of the English Language [home, info]
34. mass: Infoplease Dictionary [home, info]

Art (4 matching dictionaries)

35. mass: ArtLex Lexicon of Visual Art Terminology [home, info]
36. Mass: Essentials of Music [home, info]
37. Mass: Virginia Tech Multimedia Music Dictionary [home, info]
38. Mass: Glossary of Stamp Collecting Terms [home, info]

Business (3 matching dictionaries)

39. mass: Glossary of Legal Terms [home, info]
40. Mass: Construction Term Glossary [home, info]
41. Mass (physics), Mass, mass: Legal dictionary [home, info]

Computing (2 matching dictionaries)

42. MASS: BABEL: Computer Oriented Abbreviations and Acronyms [home, info]
43. Mass (medicine), Mass (physics), Mass, mass: Encyclopedia [home, info]

Medicine (5 matching dictionaries)

44. mass: online medical dictionary [home, info]
45. Mass: Breast Cancer Glossary of Medical Terms [home, info]
46. mass: Dictionary of Cancer Terms [home, info]
47. Mass (medicine), Mass (physics), mass: Medical dictionary [home, info]
48. Mass: University of Maryland Glossary of Medical Terms [home, info]

Miscellaneous (3 matching dictionaries)

49. mass: Sociology [home, info]
50. MASS: Acronym Finder [home, info]
51. MASS: AbbreviationZ [home, info]

Religion (2 matching dictionaries)

52. mass: Scientology® and Dianetics® [home, info]
53. MASS: Irivng Hexham's Concise Dictionary of Religion [home, info]

Science (9 matching dictionaries)

54. Mass: Chemistry Dictionary [home, info]
55. mass: Archaeology Wordsmith [home, info]
56. Mass: Eric Weisstein's World of Physics [home, info]
57. mass: Imagine the Universe! Dictionary [home, info]
58. mass: Mars Glossary [home, info]
59. Mass: Extragalactic Astronomy [home, info]
60. mass: General Chemistry Online [home, info]
61. mass: PlanetMath Encyclopedia [home, info]
62. Mass: From Stargazers to Starships Glossary [home, info]

Slang (1 matching dictionary)

63. mass: Urban Dictionary [home, info]

Sports (1 matching dictionary)

64. Mass: Body Building [home, info]

Tech (6 matching dictionaries)

65. Mass: GEOGRAPHIC INFORMATION SYSTEMS, CARTOGRAPHY, AND REMOTE SENSING [home, info]
66. Mass: AUTOMOTIVE TERMS [home, info]
67. MASS: Glossary of Composite Terms [home, info]
68. Mass: Explosives [home, info]
69. MASS: Power Engineering [home, info]
70. mass: High-Energy Astrophysics [home, info]

(Note: See masss for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (Mass) ▸ noun:  (Roman Catholic Church and Protestant Churches) the celebration of the Eucharist ▸ noun:  the property of a body that causes it to have weight in a gravitational field ▸ noun:  a sequence of prayers constituting the Christian eucharistic rite ("The priest said Mass") ▸ noun:  a musical setting for a Mass ("They played a Mass composed by Beethoven") ▸ noun:  an ill-structured collection of similar things (objects or people) ▸ noun:  a body of matter without definite shape ("A huge ice mass") ▸ noun:  the property of something that is great in magnitude ("He received a mass of correspondence") ▸ noun:  the common people generally ("Separate the warriors from the mass") ▸ noun:  (often followed by `of') a large number or amount or extent ▸ verb:  join together into a mass or collect or form a mass ("Crowds were massing outside the palace") ▸ adjective:  occurring widely (as to many people) ("Mass destruction") ▸ adjective:  gathered or tending to gather into a mass or whole ▸ name:  A surname (common: 1 in 100000 families; popularity rank in the U.S.: #18100) ▸ Also see masss ▸ Word origin ▸ Words similar to mass ▸ Usage examples for mass ▸ Idioms related to mass (New!) ▸ Popular adjectives describing mass ▸ Popular nouns described by mass ▸ Words that often appear near mass ▸ Rhymes of mass ▸ Invented words related to mass