1. horizontally level: a flat roof.
2. level, even, or without unevenness of surface, as land or tabletops.
3. having a surface that is without marked projections or depressions: a broad, flat face.
4. lying horizontally and at full length, as a person; prostrate: He was flat on the canvas after the knockdown.
5. lying wholly on or against something: The banner was flat against the wall.
6. thrown down, laid low, or level with the ground, as fallen trees or buildings.
7. having a generally level shape or appearance; not deep or thick: a flat plate.
8. (of the heel of a shoe) low and broad.
9. spread out, as an unrolled map or the open hand.
10. deflated; collapsed: a flat tire.
11. absolute, downright, or positive; without qualification: a flat denial.
12. without modification or variation: a flat rate.
13. lacking money; broke.
14. without vitality or animation; lifeless; dull: flat writing.
15. having lost its flavor, sharpness, or life, as wine or food; stale.
16. (of a beverage) having lost its effervescence.
17. without flavor; not spiced: flat cooking.
18. prosaic, banal, or insipid: a flat style.
19. pointless, as a remark or joke.
20. commercially inactive: a flat day in the stock market.
21. (of a painting) not having the illusion of volume or depth.
22. (of a photograph or painting) lacking contrast or gradations of tone or color.
23. (of paint) without gloss; not shiny; mat.
24. not clear, sharp, or ringing, as sound or a voice.
25. lacking resonance and variation in pitch; monotonous: a flat delivery of the speech.
26. Music.
• (of a tone) lowered a half step in pitch: B flat.
• below an intended pitch, as a note; too low (opposed to sharp).
27. derived without change in form, as English to brush from the noun brush and adverbs that do not add -ly to the adjective form as fast, cheap, and slow.
28. lenis; voiced.
29. Nautical. (of a sail)
• cut with little or no fullness.
• trimmed as nearly fore-and-aft as possible, for sailing to windward.
30. the a-sound (a) of glad, bat, or act.

31. something flat.
32. a shoe, especially a woman's shoe, with a flat heel or no heel.
33. a flat surface, side, or part of anything: He struck me with the flat of his hand.
34. flat or level ground; a flat area: salt flats.
35. a marsh, shoal, or shallow.
36. Music.
• (in musical notation) the character ♭, which when attached to a note or to a staff degree lowers its significance one chromatic half step.
• a tone one chromatic half step below another: The flat of B is B flat.
• (on keyboard instruments, with reference to any given note) the key next below or to the left.
37. a piece of scenery consisting of a wooden frame, usually rectangular, covered with lightweight board or fabric.
38. a broad, thin book, chiefly for children: a juvenile flat.
39. a deflated automobile tire.
40. (in postal use) a large flat package, as in a manila envelope, for mailing.
41. a flat roof or deck.
42. Nautical.
• a partial deck between two full decks.
• a low, flat barge or lighter.
43. Shipbuilding.
• a broad, flat piece of iron or steel for overlapping and joining two plates at their edges.
• a straight timber in a frame or other assembly of generally curved timbers.
44. an iron or steel bar of rectangular cross section.
45. one of a series of laths covered with card clothing, used in conjunction with the cylinder in carding.
46. one or more negatives or positives in position to be reproduced.
47. a device for holding a negative or positive flat for reproduction by photoengraving.
48. a shallow, lidless box or tray used for rooting seeds and cuttings and for growing young plants.
49. a similar box used for shipping and selling fruits and vegetables.
50. the area of the field immediately inside of or outside of an offensive end, close behind or at the line of scrimmage.
51. flat races between horses.

52. to make flat.
53. to lower (a pitch), especially one half step.

54. to become flat.

55. in a flat position; horizontally; levelly.
56. in a flat manner; positively; absolutely.
57. completely; utterly: flat broke.
58. exactly; precisely: She ran around the track in two minutes flat.
59. below the true pitch: to sing flat.
60. without interest.

61. to pull the clew of (a fore-and-aft sail) as nearly amidships as possible.

62. to fail to produce the desired effect; fail completely: His attempts at humor fell flat.
63. trimmed so that fore-and-aft sails present as flat a surface as possible, as in sailing close to the wind.
64. back¹ (def. 48).
65. flat out, Informal.
• without hesitation; directly or openly: He told us flat out he'd been a double agent.
• at full speed or with maximum effort.

1. an apartment or suite of rooms on one floor forming a residence.

1. horizontal; level
2. even or smooth, without projections or depressions
3. lying stretched out at full length; prostrate
4. having little depth or thickness; shallow
5. having a surface or side in complete contact with another surface
6. spread out, unrolled, or levelled
7. (of a tyre) deflated, either partially or completely
8. (of shoes) having an unraised or only slightly raised heel
9. mainly British
• (of races, racetracks, or racecourses) not having obstacles to be jumped
• of, relating to, or connected with flat racing as opposed to steeplechasing and hurdling
10. without qualification; total
11. without possibility of change; fixed
12. neither more nor less; exact
13. unexciting or lacking point or interest
14. without variation or resonance; monotonous
15. (of food) stale or tasteless
16. (of beer, sparkling wines, etc) having lost effervescence, as by exposure to air
17. (of trade, business, a market, etc) commercially inactive; sluggish
18. (of a battery) fully discharged; dead
19. (of a print, photograph, or painting) lacking contrast or shading between tones
20. (of paint) without gloss or lustre; matt
21. (of a painting) lacking perspective
22. (of lighting) diffuse
23. music
• denoting a note of a given letter name (or the sound it represents) that has been lowered in pitch by one chromatic semitone
• (of an instrument, voice, etc) out of tune by being too low in pitch
24. phonetics another word for lenis
25. the vowel sound of a as in the usual US or S Brit pronunciation of hand, cat, usually represented by the symbol (æ)

26. in or into a prostrate, level, or flat state or position
27. completely or utterly; absolutely
28. exactly; precisely
29. music
• lower than a standard pitch
• too low in pitch
30. to fail to achieve a desired effect, etc
31. flat out informal
• with the maximum speed or effort
• totally exhausted

32. a flat object, surface, or part
33. a low-lying tract of land, esp a marsh or swamp
34. a mud bank exposed at low tide
35. music
• an accidental that lowers the pitch of the following note by one chromatic semitone
• a note affected by this accidental
36. a rectangular wooden frame covered with painted canvas, etc, used to form part of a stage setting
37. a punctured car tyre
38. the flat mainly British ((often cap.))
• flat racing, esp as opposed to steeplechasing and hurdling
• the season of flat racing
39. a flatboat or lighter
40. a shallow box or container, used for holding plants, growing seedlings, etc

41. to make or become flat
42. music the usual US word for flatten (def. 3)

1. a set of rooms comprising a residence entirely on one floor of a building
2. a portion of a house used as separate living quarters
3. a house shared with people who are not members of one's own family

4. to live in a flat (with someone)

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