(1):

(v. i.) To fall form the pitch.

(2):

(v. i.) To become flat, or flattened; to sink or fall to an even surface.

(3):

(a.) Having a head at a very obtuse angle to the shaft; - said of a club.

(4):

(a.) 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.

(5):

(a.) Flattening at the ends; - said of certain fruits.

(6):

(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.

(7):

(superl.) Clear; unmistakable; peremptory; absolute; positive; downright.

(8):

(superl.) Having an even and horizontal surface, or nearly so, without prominences or depressions; level without inclination; plane.

(9):

(v. t.) To render dull, insipid, or spiritless; to depress.

(10):

(v. t.) To depress in tone, as a musical note; especially, to lower in pitch by half a tone.

(11):

(v. t.) To make flat; to flatten; to level.

(12):

(superl.) Wanting relief; destitute of variety; without points of prominence and striking interest.

(13):

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

(14):

(n.) A character [/] before a note, indicating a tone which is a half step or semitone lower.

(15):

(n.) A horizontal vein or ore deposit auxiliary to a main vein; also, any horizontal portion of a vein not elsewhere horizontal.

(16):

(n.) A floor, loft, or story in a building; especially, a floor of a house, which forms a complete residence in itself.

(17):

(n.) The flat part, or side, of anything; as, the broad side of a blade, as distinguished from its edge.

(18):

(n.) A platform on wheel, upon which emblematic designs, etc., are carried in processions.

(19):

(n.) A car without a roof, the body of which is a platform without sides; a platform car.

(20):

(n.) A straw hat, broad-brimmed and low-crowned.

(21):

(n.) A flat-bottomed boat, without keel, and of small draught.

(22):

(n.) Something broad and flat in form

(23):

(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.

(24):

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

(25):

(adv.) Without allowance for accrued interest.

(26):

(adv.) In a flat manner; directly; flatly.

(27):

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

(28):

(n.) A homaloid space or extension.

(29):

(n.) A dull fellow; a simpleton; a numskull.

(30):

(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.

(31):

(superl.) Not sharp or shrill; not acute; as, a flat sound.

(32):

(superl.) Below the true pitch; hence, as applied to intervals, minor, or lower by a half step; as, a flat seventh; A flat.

(33):

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