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We found 54 dictionaries with English definitions that include the word alien:
Click on the first link on a line below to go directly to a page where "alien" is defined.

General (30 matching dictionaries)

1. alien: Merriam-Webster.com [home, info]
2. alien: Oxford Learner's Dictionaries [home, info]
3. alien: American Heritage Dictionary of the English Language [home, info]
4. alien: Collins English Dictionary [home, info]
5. alien: Vocabulary.com [home, info]
6. alien, alien: Macmillan Dictionary [home, info]
7. Alien, alien: Wordnik [home, info]
8. alien: Cambridge Advanced Learner's Dictionary [home, info]
9. alien: Wiktionary [home, info]
10. alien: Webster's New World College Dictionary, 4th Ed. [home, info]
11. alien: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. alien: Infoplease Dictionary [home, info]
13. alien: Dictionary.com [home, info]
14. alien (adj.): Online Etymology Dictionary [home, info]
15. alien: UltraLingua English Dictionary [home, info]
16. alien: Cambridge Dictionary of American English [home, info]
17. AliEn (ALICE Environment), Alien (Alien), Alien (Alien franchise), Alien (Atlanta Rhythm Section song), Alien (Britney Spears song), Alien (Northlane album), Alien (Pennywise song), Alien (Strapping Young Lad album), Alien (United States), Alien (band), Alien (biology), Alien (creature in Alien franchise), Alien (disambiguation), Alien (file converter), Alien (film), Alien (film franchise), Alien (film series), Alien (franchise), Alien (game), Alien (law), Alien (movie), Alien (sculpture), Alien (software), Alien (soundtrack), Alien (video game), Alien, The Alien (Animorphs), The Alien (novel), The Alien (unproduced film), The Alien (unreleased film): Wikipedia, the Free Encyclopedia [home, info]
18. Alien: Online Plain Text English Dictionary [home, info]
19. alien: Webster's Revised Unabridged, 1913 Edition [home, info]
20. alien: Rhymezone [home, info]
21. alien: AllWords.com Multi-Lingual Dictionary [home, info]
22. alien: Webster's 1828 Dictionary [home, info]
23. alien: Free Dictionary [home, info]
24. alien: Mnemonic Dictionary [home, info]
25. alien: WordNet 1.7 Vocabulary Helper [home, info]
26. alien: LookWAYup Translating Dictionary/Thesaurus [home, info]
27. alien: Wikimedia Commons US English Pronunciations [home, info]
28. alien: Dictionary/thesaurus [home, info]

Business (13 matching dictionaries)

29. alien: Webster's New World Law Dictionary [home, info]
30. Alien: Duhaime's Canadian law dictionary [home, info]
31. alien: Law.com Dictionary [home, info]
32. alien: Everybody's Legal Dictionary [home, info]
33. Alien: THE 'LECTRIC LAW LIBRARY'S REFERENCE ROOM [home, info]
34. alien: Glossary of Legal Terms [home, info]
35. Alien: A DICTIONARY OF LAW (1893) [home, info]
36. Alien: MSN Money [home, info]
37. ALIEN: Bouvier's Law Dictionary 1856 Edition [home, info]
38. Alien: Investopedia [home, info]
39. alien: Legal dictionary [home, info]
40. Alien (law), Alien: Financial dictionary [home, info]
41. alien: BusinessDictionary.com [home, info]

Computing (1 matching dictionary)

42. alien: Encyclopedia [home, info]

Miscellaneous (4 matching dictionaries)

43. alien: Political [home, info]
44. alien: Genealogy Glossary [home, info]
45. ALIEN: Acronym Finder [home, info]
46. ALIEN: AbbreviationZ [home, info]

Religion (1 matching dictionary)

47. Alien: Easton Bible [home, info]

Science (2 matching dictionaries)

48. alien: Botanical Terms [home, info]
49. alien: Evolution Glossary [home, info]

Slang (1 matching dictionary)

50. The Alien: Urban Dictionary [home, info]

Sports (1 matching dictionary)

51. Alien: 2060 Shadow-Slang [home, info]

Tech (1 matching dictionary)

52. ALIEN: Space and Electronic Warfare Lexicon [home, info]

(Note: See aliens for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (alien) ▸ noun:  a person who comes from a foreign country; someone who does not owe allegiance to your country ▸ noun:  anyone who does not belong in the environment in which they are found ▸ noun:  a form of life assumed to exist outside the Earth or its atmosphere ▸ verb:  transfer property or ownership ("The will aliened the property to the heirs") ▸ verb:  arouse hostility or indifference in where there had formerly been love, affection, or friendliness ▸ adjective:  not contained in or deriving from the essential nature of something ("An economic theory alien to the spirit of capitalism") ▸ adjective:  being or from or characteristic of another place or part of the world ("Alien customs") ▸ Also see aliens ▸ Word origin ▸ Words similar to alien ▸ Usage examples for alien ▸ Idioms related to alien (New!) ▸ Popular adjectives describing alien ▸ Popular nouns described by alien ▸ Words that often appear near alien ▸ Rhymes of alien ▸ Invented words related to alien