Smooth; having no protrusions, indentations or other surface irregularities, or relatively so.
Having a head at a very obtuse angle to the shaft.
Unable to emit power; dead.
Lacking acidity without being sweet.
Not having an inflectional ending or sign, such 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".
Absolute; downright; peremptory.
Without variation in tone or hue (uniform), and dull (not glossy).
Without variation in level, quantity, value, tone etc.
Of fees, fares etc., fixed; unvarying.
Lowered by one semitone.
Without spin; spinless.
Having small or invisible breasts and/or buttocks.
At a consistently depressed level; consistently lacklustre.
Flattening at the ends.
With all or most of its carbon dioxide having come out of solution so that the drink no longer fizzes or contains any bubbles.
Exact.
In a horizontal line or plane; not sloping.
Lacking liveliness or action; depressed; uninteresting; dull and boring.
Of a note or voice, lower in pitch than it should be.
Without variations in pitch.
Deflated, especially because of a puncture.
Having no variations in height.
Lacking in depth, substance, or believability; underdeveloped; one-dimensional.
A flat tyre/flat tire.
A rectangular wooden structure covered with masonite, lauan, or muslin, often produced in standard modules, that is used to build wall surfaces on stage. Flats can be painted and outfitted with doors and/or windows to depict a building or other part of a scene. It's a hard-surfaced alternative to a backcloth orbackdrop.
An area of level ground (sometimes covered with water).
A flat-bottomed boat, without keel, and of small draught.
An early kind of toy soldier having a flat design.
The palm of the hand, with the adjacent part of the fingers.
A large mail piece measuring at least 8 1/2 by 11 inches, such as catalogs, magazines, and unfolded paper enclosed in large envelopes.
A flat (i.e. plane) mirror
The flat side of a blade, as opposed to the sharp edge.
A subset of n-dimensional space that is congruent to a Euclidean space of lower dimension.
A flat, glossy children's book with few pages.
A platform on a wheel, upon which emblematic designs etc. are carried in processions.
A railroad car without a roof, and whose body is a platform without sides; a platform car or flatcar.
An apartment, usually on one level and usually consisting of more than one room.
Level ground in general.
A note played a semitone lower than a natural, denoted by the symbol ♭ placed after the letter representing the note (e.g., B♭) or in front of the note symbol (e.g. ♭♪).
A type of ladies' shoe with a very low heel.
Level horse-racing ground, as contrasted with courses incorporating jumps, or the racing done on such ground.
A wide, shallow container or pallet.
A straw hat, broad-brimmed and low-crowned.
A horizontal vein or ore deposit auxiliary to a main vein; also, any horizontal portion of a vein not elsewhere horizontal.
A cheater's die with the edges shaved to make certain rolls more likely.
Any of various hesperiid butterflies that spread their wings open when they land.
A thin, broad brush used in oil and watercolour painting.
A flat sheet for use on a bed.
the area in the centre of a racecourse.
A type of flat-soled running shoe without spikes.
To make a flat call; to call without raising.
To fall from the pitch.
To become flat or flattened; to sink or fall to an even surface.
To depress in tone, as a musical note; especially, to lower in pitch by half a tone.
To dash or throw
To dash, rush
Used to emphasize the smallness of the measurement.
Completely.
Without allowance for accrued interest.
Bluntly.
In the mile race, Smith's time was 3:58.56, and Brown's was four minutes flat.
Directly; flatly.
Exactly, precisely.
So as to be flat.
Not smooth; uneven.
Turbulent.
Crude; unrefined.
Approximate; hasty or careless; not finished.
Difficult; trying.
Violent; not careful or subtle.
Not polished; uncut.
Harsh-tasting.
Somewhat ill; sick; in poor condition.
Unwell due to alcohol; hungover.
Loud and hoarse; offensive to the ear; harsh; grating.
Worn; shabby; weather-beaten.
To render rough; to roughen.
To break in (a horse, etc.), especially for military purposes.
To create in an approximate form.
To endure primitive conditions.
To roughen a horse's shoes to keep the animal from slipping.
To commit the offense of roughing, i.e. to punch another player.
A quick sketch, similar to a thumbnail but larger and more detailed, used for artistic brainstorming.
A scuffed and roughened area of the pitch, where the bowler's feet fall, used as a target by spin bowlers because of its unpredictable bounce.
The unmowed part of a golf course.
The raw material from which faceted or cabochon gems are created.
A rude fellow; a coarse bully; a rowdy.
A piece inserted in a horseshoe to keep the animal from slipping.
In a rough manner; rudely; roughly.