adj. 平坦的；扁平的；浅的；单调的 (flat的变形)

Flat \Flat\ (fl[a^]t), a. [Compar. {Flatter} (fl[a^]t"r[~e]r);
superl. {Flattest} (fl[a^]t"t[e^]st).] [Akin to Icel. flatr,
Sw. flat, Dan. flad, OHG. flaz, and AS. flet floor, G.
fl["o]tz stratum, layer.]
1. Having an even and horizontal surface, or nearly so,
without prominences or depressions; level without
inclination; plane.

Though sun and moon
Were in the flat sea sunk. --Milton.

2. 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.

What ruins kingdoms, and lays cities flat! --Milton.

I feel . . . my hopes all flat. --Milton.

3. (Fine Arts) Wanting relief; destitute of variety; without
points of prominence and striking interest.

A large part of the work is, to me, very flat.
--Coleridge.

4. Tasteless; stale; vapid; insipid; dead; as, fruit or drink
flat to the taste.

5. Unanimated; dull; uninteresting; without point or spirit;
monotonous; as, a flat speech or composition.

How weary, stale, flat, and unprofitable
Seem to me all the uses of this world. --Shak.

6. Lacking liveliness of commercial exchange and dealings;
depressed; dull; as, the market is flat.

7. Clear; unmistakable; peremptory; absolute; positive;
downright.

Syn: flat-out.

Flat burglary as ever was committed. --Shak.

A great tobacco taker too, -- that's flat.
--Marston.

8. (Mus.)
(a) Below the true pitch; hence, as applied to intervals,
minor, or lower by a half step; as, a flat seventh; A
flat.
(b) Not sharp or shrill; not acute; as, a flat sound.

9. (Phonetics) Sonant; vocal; -- applied to any one of the
sonant or vocal consonants, as distinguished from a
nonsonant (or sharp) consonant.

10. (Golf) Having a head at a very obtuse angle to the shaft;
-- said of a club.
[Webster 1913 Suppl.]

11. (Gram.) Not having an inflectional ending or sign, as a
noun used as an adjective, or an adjective as an adverb,
without the addition of a formative suffix, or an
infinitive without the sign to. Many flat adverbs, as in
run fast, buy cheap, are from AS. adverbs in -["e], the
loss of this ending having made them like the adjectives.
Some having forms in ly, such as exceeding, wonderful,
true, are now archaic.
[Webster 1913 Suppl.]

12. (Hort.) Flattening at the ends; -- said of certain
fruits.
[Webster 1913 Suppl.]

{Flat arch}. (Arch.) See under {Arch}, n., 2. (b).

{Flat cap}, cap paper, not folded. See under {Paper}.

{Flat chasing}, in fine art metal working, a mode of
ornamenting silverware, etc., producing figures by dots
and lines made with a punching tool. --Knight.

{Flat chisel}, a sculptor's chisel for smoothing.

{Flat file}, a file wider than its thickness, and of
rectangular section. See {File}.

{Flat nail}, a small, sharp-pointed, wrought nail, with a
flat, thin head, larger than a tack. --Knight.

{Flat paper}, paper which has not been folded.

{Flat rail}, a railroad rail consisting of a simple flat bar
spiked to a longitudinal sleeper.

{Flat rods} (Mining), horizontal or inclined connecting rods,
for transmitting motion to pump rods at a distance.
--Raymond.

{Flat rope}, a rope made by plaiting instead of twisting;
gasket; sennit.

Note: Some flat hoisting ropes, as for mining shafts, are
made by sewing together a number of ropes, making a
wide, flat band. --Knight.

{Flat space}. (Geom.) See {Euclidian space}.

{Flat stitch}, the process of wood engraving. [Obs.] -- {Flat
tint} (Painting), a coat of water color of one uniform shade.


{To fall flat} (Fig.), to produce no effect; to fail in the
intended effect; as, his speech fell flat.

Of all who fell by saber or by shot,
Not one fell half so flat as Walter Scott. --Lord
Erskine.