We found 47 dictionaries that define the word week:

General (33 matching dictionaries)

1. week: Merriam-Webster.com
2. week: Oxford Learner's Dictionaries
3. week: American Heritage Dictionary of the English Language
4. week: Collins English Dictionary
5. Week, week, week: Wordnik
6. week: Cambridge Advanced Learner's Dictionary
7. week: Wiktionary
8. week: Webster's New World College Dictionary, 4th Ed.
9. week: The Wordsmyth English Dictionary-Thesaurus
10. week: Infoplease Dictionary
11. Week, week: Dictionary.com
12. week: Online Etymology Dictionary
13. week: Cambridge Essential American English Dictionary
14. The Week (Brisbane), The Week (Indian magazine), The Week (disambiguation), The Week, Week (Chungha song), Week (disambiguation), Week: Wikipedia, the Free Encyclopedia
15. Week: Online Plain Text English Dictionary
16. week: Webster's Revised Unabridged, 1913 Edition
17. week: Rhymezone
18. week, week (de): AllWords.com Multi-Lingual Dictionary
19. week: Webster's 1828 Dictionary
20. week: Free Dictionary
21. week: Mnemonic Dictionary
22. week: LookWAYup Translating Dictionary/Thesaurus
23. week: Dictionary/thesaurus
24. week: Wikimedia Commons US English Pronunciations

Business (3 matching dictionaries)

25. Week: A DICTIONARY OF LAW (1893)
26. Week: Legal dictionary
27. BusinessDictionary.com (No longer online)

Computing (1 matching dictionary)

28. week: Encyclopedia

Miscellaneous (4 matching dictionaries)

29. Encyclopedia of Graphic Symbols (No longer online)
30. Sound-Alike Words (No longer online)
31. AbbreviationZ (No longer online)
32. week: Idioms

Religion (2 matching dictionaries)

33. Week: Easton Bible
34. Week: Smith's Bible Dictionary

Science (3 matching dictionaries)

35. Week: Eric Weisstein's World of Astronomy
36. Week: Extragalactic Astronomy
37. How Many? A Dictionary of Units of Measurement (No longer online)

Slang (1 matching dictionary)

38. week: Urban Dictionary

(Note: See weeks as well.)

Definitions from Wiktionary ( ) ▸ noun:  Any period of seven consecutive days. ▸ noun:  A period of seven days beginning with Sunday or Monday. ▸ noun:  A period of five days beginning with Monday. ▸ noun:  A subdivision of the month into longer periods of work days punctuated by shorter weekend periods of days for markets, rest, or religious observation such as a sabbath. ▸ noun:  (following a named day) A date seven days after (sometimes before) the specified day. Similar: workweek, hebdomad, calendar week, month, weekend, fortnight, year, days, Monday, hour, more... Opposite: month, year, decade, century, millennium Types: work week, school week, weekend, holy week, week of the year, more... Phrases: a week, one week, week in, this week, each week, more... Adjectives: last, next, first, second, third, past, whole, previous, hour, fourth, day ▸ Word origin ▸ Words similar to week ▸ Usage examples for week ▸ Idioms related to week ▸ Civic discussion about week (New!) ▸ Popular adjectives describing week ▸ Words that often appear near week ▸ Rhymes of week ▸ Invented words related to week