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We found 43 dictionaries with English definitions that include the word knock:
Click on the first link on a line below to go directly to a page where "knock" is defined.

General (32 matching dictionaries)

1. knock: Merriam-Webster.com [home, info]
2. knock: Oxford Dictionaries [home, info]
3. knock: American Heritage Dictionary of the English Language [home, info]
4. knock: Collins English Dictionary [home, info]
5. knock: Vocabulary.com [home, info]
6. knock, knock: Macmillan Dictionary [home, info]
7. Knock, knock: Wordnik [home, info]
8. knock: Cambridge Advanced Learner's Dictionary [home, info]
9. knock: Wiktionary [home, info]
10. knock: Webster's New World College Dictionary, 4th Ed. [home, info]
11. knock: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. knock: Infoplease Dictionary [home, info]
13. Knock, knock: Dictionary.com [home, info]
14. knock (v.): Online Etymology Dictionary [home, info]
15. knock: UltraLingua English Dictionary [home, info]
16. knock: Cambridge Dictionary of American English [home, info]
17. knock: Cambridge International Dictionary of Idioms [home, info]
18. Knock (play), Knock (short-story), Knock (short story), Knock, The Knock (disambiguation), The Knock: Wikipedia, the Free Encyclopedia [home, info]
19. knock: Cambridge International Dictionary of Phrasal Verbs [home, info]
20. Knock: Online Plain Text English Dictionary [home, info]
21. knock: Webster's Revised Unabridged, 1913 Edition [home, info]
22. knock: Rhymezone [home, info]
23. knock: AllWords.com Multi-Lingual Dictionary [home, info]
24. knock: Webster's 1828 Dictionary [home, info]
25. knock: All About Homonyms [home, info]
26. knock: Free Dictionary [home, info]
27. knock: Mnemonic Dictionary [home, info]
28. knock: WordNet 1.7 Vocabulary Helper [home, info]
29. knock: LookWAYup Translating Dictionary/Thesaurus [home, info]
30. knock: Dictionary/thesaurus [home, info]

Art (1 matching dictionary)

31. Knock: Virginia Tech Multimedia Music Dictionary [home, info]

Business (1 matching dictionary)

32. Knock (disambiguation), The Knock (disambiguation), knock: Legal dictionary [home, info]

Computing (1 matching dictionary)

33. Knock (disambiguation), The Knock (disambiguation), knock: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

34. Knock: MedFriendly Glossary [home, info]
35. knock: online medical dictionary [home, info]

Miscellaneous (2 matching dictionaries)

36. KNOCK: Ka-BOOM! Comicbook Words on Historical Principles [home, info]
37. knock: Idioms [home, info]

Religion (1 matching dictionary)

38. Knock: Easton Bible [home, info]

Slang (1 matching dictionary)

39. knock: ESL Slang page [home, info]

Tech (2 matching dictionaries)

40. Knock: AUTOMOTIVE TERMS [home, info]
41. KNOCK: Power Engineering [home, info]

(Note: See knocks for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (knock) ▸ noun:  the act of hitting vigorously ▸ noun:  negative criticism ▸ noun:  a bad experience ("The school of hard knocks") ▸ noun:  the sound of knocking (as on a door or in an engine or bearing) ("The knocking grew louder") ▸ noun:  a vigorous blow ("The sudden knock floored him") ▸ verb:  find fault with; express criticism of; point out real or perceived flaws ("Don't knock the food--it's free") ▸ verb:  deliver a sharp blow or push :"He knocked the glass clear across the room" ▸ verb:  rap with the knuckles ("Knock on the door") ▸ verb:  knock against with force or violence ▸ verb:  sound like a car engine that is firing too early ▸ verb:  make light, repeated taps on a surface ▸ name:  A surname (very rare: popularity rank in the U.S.: #56249) ▸ Also see knocks ▸ Word origin ▸ Words similar to knock ▸ Usage examples for knock ▸ Popular adjectives describing knock ▸ Words that often appear near knock ▸ Rhymes of knock ▸ Invented words related to knock