| 1. | an act or instance of making clean: Give the house a good cleaning. |
| 2. | Slang. an overwhelming or complete defeat, financial loss, or failure: Our team took a cleaning in yesterday's game. |
| 3. | Informal. killing (def. 3). |
adjective, -er, -est, adverb, -er, -est, verb | 1. | free from dirt; unsoiled; unstained: She bathed and put on a clean dress. |
| 2. | free from foreign or extraneous matter: clean sand. |
| 3. | free from pollution; unadulterated; pure: clean air; clean water. |
| 4. | habitually free of dirt: Cats are considered clean animals. |
| 5. | characterized by a fresh, wholesome quality: the clean smell of pine. |
| 6. | free from all writing or marking: a clean sheet of paper. |
| 7. | having few or no corrections; easily readable: The publisher demanded clean proofs from the printer. |
| 8. | free from roughness or irregularity: He made a clean cut with a razor. |
| 9. | not ornate; gracefully spare; forceful and simple; trim; streamlined: a clean literary style; the clean lines of a ship. |
| 10. | complete; unqualified: a clean break with tradition. |
| 11. | morally pure; innocent; upright; honorable: to lead a clean life. |
| 12. | showing good sportsmanship; fair: a clean fighter. |
| 13. | inoffensive in language or content; without obscenity. |
| 14. | (of a document, record, etc.) bearing no marks of discreditable or unlawful conduct; listing no offenses: a clean driver's license. |
| 15. | Slang.
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| 16. | (of a nuclear weapon) producing little or no radioactive fallout. |
| 17. | not radioactive. |
| 18. | (of a document or financial instrument) free from qualifications or restrictions: a clean bill of lading. |
| 19. | free from defects or flaws: a clean diamond. |
| 20. | free from encumbrances or obstructions. |
| 21. | neatly or evenly made or proportioned; shapely; trim: a clean profile. |
| 22. | made without any unanticipated difficulty or interference: The bank robbers made a clean getaway. |
| 23. | Chiefly Biblical. having no physical or moral blemish or carrying no taboo so as to make impure according to the laws, esp. the dietary or ceremonial laws: a clean animal; clean persons. |
| 24. | dexterously performed; adroit: a clean serve in tennis. |
| 25. | (of a jump over an obstacle) made without touching the obstacle. |
| 26. | Slang. having no direct associations, business interests, etc., that could prejudice one's official acts or decisions: The new governor is clean because he's sold his construction business and doesn't owe political favors to anyone. |
| 27. | Slang. without money or funds. |
| 28. | (of wine) having a taste that is unusually refreshing and smooth. |
| 29. | Nautical. (of an anchorage, harbor, etc.) free of obstructions or hazards (opposed to foul ). |
| 30. | (of the legs of a horse) free from injury or blemish, as capped hocks, splints, or scars. |
| 31. | Foreign Exchange. (of currency floats) not influenced by exchange-rate manipulation (opposed to dirty ). |
| 32. | in a clean manner; cleanly: Nobody wants to box with him because he doesn't fight clean. |
| 33. | so as to be clean: This shirt will never wash clean. |
| 34. | Informal. wholly; completely; quite: The sharp carving knife sliced clean through the roast. In a year, he had gone clean through his inheritance. |
| 35. | to make clean: Clean those dirty shoes. |
| 36. | to remove or consume the contents of; empty; clear: She sat down to dinner ravenous and within five minutes had cleaned her plate. |
| 37. | to dry-clean. |
| 38. | to remove the entrails and other inedible parts from (poultry, fish, etc.); dress. |
| 39. | Slang. to take away or win all or almost all the money or possessions of (often fol. by out): The cards were marked and I got cleaned. |
| 40. | Metallurgy. to remove the seams from (a casting) by filing or grinding. |
| 41. | Philately. to delete intentionally the cancellation from (a postage or revenue stamp). |
| 42. | to perform or undergo a process of cleaning: This kind of fabric cleans easily. Detergents clean better than most soaps. |
| 43. | to get rid of dirt, soil, etc. (often fol. by up): to spend the morning cleaning. |
| 44. | clean out,
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| 45. | clean up,
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| 46. | clean full, Nautical.
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| 47. | clean house, to wipe out corruption, inefficiency, etc., as in an organization: It's time for the city government to clean house. |
| 48. | clean up one's act. act (def. 27). |
| 49. | come clean, Slang. to tell the truth, esp. to admit one's guilt. |

clean (klēn) adj. clean·er, clean·est
v. tr.
To undergo or perform an act of cleaning. Phrasal Verbs: clean out
clean out
Idiom(s): clean house Slang To eliminate or discard what is undesirable: The scandal forced the company to clean house. [Middle English clene, from Old English clǣne.] clean'a·ble adj., clean'ness n. Synonyms: These adjectives mean free from dirt: clean clothing; antiseptic surgical instruments; a cleanly pet; an immaculate tablecloth; a spotless kitchen. |