Meaning of FLAT in English

vi to fall form the pitch.

2. flat ·noun a homaloid space or extension.

3. flat ·noun something broad and flat in form.

4. flat ·adv in a flat manner; directly; flatly.

5. flat ·noun a dull fellow; a simpleton; a numskull.

6. flat ·adv without allowance for accrued interest.

7. flat ·noun a straw hat, broad-brimmed and low-crowned.

8. flat ·superl not sharp or shrill; not acute; as, a flat sound.

9. flat ·noun a flat-bottomed boat, without keel, and of small draught.

10. flat ·add. ·adj flattening at the ends;

— said of certain fruits.

11. flat ·vi to become flat, or flattened; to sink or fall to an even surface.

12. flat ·superl clear; unmistakable; peremptory; absolute; positive; downright.

13. flat ·vt to render dull, insipid, or spiritless; to depress.

14. flat ·vt to make flat; to flatten; to level.

15. flat ·superl tasteless; stale; vapid; insipid; dead; as, fruit or drink flat to the taste.

xvi. flat ·noun a car without a roof, the body of which is a platform without sides; a platform car.

xvii. flat ·add. ·adj having a head at a very obtuse angle to the shaft;

— said of a club.

xviii. flat ·noun a platform on wheel, upon which emblematic designs, ·etc., are carried in processions.

xix. flat ·vt to depress in tone, as a musical note; especially, to lower in pitch by half a tone.

xx. flat ·noun a character before a note, indicating a tone which is a half step or semitone lower.

xxi. flat ·superl wanting relief; destitute of variety; without points of prominence and striking interest.

xxii. flat ·noun the flat part, or side, of anything; as, the broad side of a blade, as distinguished from its edge.

xxiii. flat ·superl lacking liveliness of commercial exchange and dealings; depressed; dull; as, the market is flat.

xxiv. flat ·superl unanimated; dull; uninteresting; without point or spirit; monotonous; as, a flat speech or composition.

xxv. flat ·noun a floor, loft, or story in a building; especially, a floor of a house, which forms a complete residence in itself.

xxvi. flat ·superl below the true pitch; hence, as applied to intervals, minor, or lower by a half step; as, a flat seventh; a flat.

xxvii. flat ·noun a horizontal vein or ore deposit auxiliary to a main vein; also, any horizontal portion of a vein not elsewhere horizontal.

xxviii. flat ·superl having an even and horizontal surface, or nearly so, without prominences or depressions; level without inclination; plane.

xxix. flat ·superl sonant; vocal;

— applied to any one of the sonant or vocal consonants, as distinguished from a nonsonant (or sharp) consonant.

xxx. flat ·noun 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.

xxxi. flat ·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.

xxxii. flat ·noun 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.

xxxiii. flat ·add. ·adj 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 English vocab.      Английский словарь Webster.