Definitions for the word "flat" from multiple English dictionaries.
1. superl.
Having an even and horizontal surface, or nearly so, without prominences or depressions; level without inclination; plane.
Source: The 1913 Webster Unabridged Dictionary, 1913
2. superl.
Lying at full length, or spread out, upon the ground; level with the ground or earth; prostrate; as, to lie flat on the ground; hence, fallen; laid low; ruined; destroyed.
Source: The 1913 Webster Unabridged Dictionary, 1913
3. superl.
Wanting relief; destitute of variety; without points of prominence and striking interest.
Source: The 1913 Webster Unabridged Dictionary, 1913
4. superl.
Tasteless; stale; vapid; insipid; dead; as, fruit or drink flat to the taste.
Source: The 1913 Webster Unabridged Dictionary, 1913
5. superl.
Unanimated; dull; uninteresting; without point or spirit; monotonous; as, a flat speech or composition.
Source: The 1913 Webster Unabridged Dictionary, 1913
6. superl.
Lacking liveliness of commercial exchange and dealings; depressed; dull; as, the market is flat.
Source: The 1913 Webster Unabridged Dictionary, 1913
7. superl.
Clear; unmistakable; peremptory; absolute; positive; downright.
Source: The 1913 Webster Unabridged Dictionary, 1913
8. superl.
Below the true pitch; hence, as applied to intervals, minor, or lower by a half step; as, a flat seventh; A flat.
Source: The 1913 Webster Unabridged Dictionary, 1913
9. superl.
Not sharp or shrill; not acute; as, a flat sound.
Source: The 1913 Webster Unabridged Dictionary, 1913
10. superl.
Sonant; vocal; -- applied to any one of the sonant or vocal consonants, as distinguished from a nonsonant (or sharp) consonant.
Source: The 1913 Webster Unabridged Dictionary, 1913
11. adv.
In a flat manner; directly; flatly.
Source: The 1913 Webster Unabridged Dictionary, 1913
12. adv.
Without allowance for accrued interest.
Source: The 1913 Webster Unabridged Dictionary, 1913
13. n.
A level surface, without elevation, relief, or prominences; an extended plain; specifically, in the United States, a level tract along the along the banks of a river; as, the Mohawk Flats.
Source: The 1913 Webster Unabridged Dictionary, 1913
14. n.
A level tract lying at little depth below the surface of water, or alternately covered and left bare by the tide; a shoal; a shallow; a strand.
Source: The 1913 Webster Unabridged Dictionary, 1913
15. n.
Something broad and flat in form
Source: The 1913 Webster Unabridged Dictionary, 1913
16. n.
A flat-bottomed boat, without keel, and of small draught.
Source: The 1913 Webster Unabridged Dictionary, 1913
17. n.
A straw hat, broad-brimmed and low-crowned.
Source: The 1913 Webster Unabridged Dictionary, 1913
18. n.
A car without a roof, the body of which is a platform without sides; a platform car.
Source: The 1913 Webster Unabridged Dictionary, 1913
19. n.
A platform on wheel, upon which emblematic designs, etc., are carried in processions.
Source: The 1913 Webster Unabridged Dictionary, 1913
20. n.
The flat part, or side, of anything; as, the broad side of a blade, as distinguished from its edge.
Source: The 1913 Webster Unabridged Dictionary, 1913
21. n.
A floor, loft, or story in a building; especially, a floor of a house, which forms a complete residence in itself.
Source: The 1913 Webster Unabridged Dictionary, 1913
22. n.
A horizontal vein or ore deposit auxiliary to a main vein; also, any horizontal portion of a vein not elsewhere horizontal.
Source: The 1913 Webster Unabridged Dictionary, 1913
23. n.
A dull fellow; a simpleton; a numskull.
Source: The 1913 Webster Unabridged Dictionary, 1913
24. n.
A character [/] before a note, indicating a tone which is a half step or semitone lower.
Source: The 1913 Webster Unabridged Dictionary, 1913
25. n.
A homaloid space or extension.
Source: The 1913 Webster Unabridged Dictionary, 1913
26. v. t.
To make flat; to flatten; to level.
Source: The 1913 Webster Unabridged Dictionary, 1913
27. v. t.
To render dull, insipid, or spiritless; to depress.
Source: The 1913 Webster Unabridged Dictionary, 1913
28. v. t.
To depress in tone, as a musical note; especially, to lower in pitch by half a tone.
Source: The 1913 Webster Unabridged Dictionary, 1913
29. v. i.
To become flat, or flattened; to sink or fall to an even surface.
Source: The 1913 Webster Unabridged Dictionary, 1913
30. v. i.
To fall form the pitch.
Source: The 1913 Webster Unabridged Dictionary, 1913
31. adj.
(flatter, flattest) 1 a horizontally level. B even; smooth; unbroken. C level and shallow (flat cap). 2 unqualified; downright (flat refusal). 3 a dull; lifeless; monotonous (in a flat tone). B dejected. 4 (of a fizzy drink) having lost its effervescence. 5 (of an accumulator, battery, etc.) Having exhausted its charge. 6 mus. A below true or normal pitch (violins are flat). B (of a key) having a flat or flats in the signature. C (as b, e, etc. Flat) semitone lower than b, e, etc. 7 (of a tyre) punctured; deflated. adv. 1 at full length; spread out (lay flat; flat against the wall). 2 colloq. A completely, absolutely (flat broke). B exactly (in five minutes flat). 3 mus. Below the true or normal pitch (sings flat). n. 1 flat part or thing (flat of the hand). 2 level ground, esp. A plain or swamp. 3 mus. A note lowered a semitone below natural pitch. B sign indicating this. 4 (as the flat) flat racing or its season. 5 theatr. Flat scenery on a frame. 6 esp. Us colloq. Flat tyre. flat out 1 at top speed. 2 using all one''s strength etc. That''s flat colloq. That is definite. flatly adv. Flatness n. Flattish adj. [old norse]
Source: Oxford English Dictionary, 1884
32. n.
Set of rooms, usu. On one floor, as a residence. flatlet n. [obsolete flet floor, dwelling, from germanic: related to *flat1]
Source: Oxford English Dictionary, 1884
33. slang
a fool, a silly or “soft” person; the opposite of “sharp.” The
terms appear to be shortenings for “sharp-witted” and “flat-witted.” Or,
maybe, from musical notes.
Source: The Slang Dictionary, 1864
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