Definitions
1.nounAn area of level ground.
2.nounA 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. ♭♪).
3.nounA flat tyre/tire.
4.noun(in the plural) A type of ladies' shoes with very low heels."She liked to walk in her flats more than in her high heels."
5.noun(in the plural) A type of flat-soled running shoe without spikes.
6.nounA thin, broad brush used in oil and watercolor/watercolour painting.
7.nounThe flat part of something:
8.nounA wide, shallow container or pallet."a flat of strawberries"
9.noun(mail) A large mail piece measuring at least 8 1/2 by 11 inches, such as catalogs, magazines, and unfolded paper enclosed in large envelopes.
10.nounA railroad car without a roof, and whose body is a platform without sides; a platform car or flatcar.
11.nounA flat-bottomed boat, without keel, and of small draught.
12.nounA subset of n-dimensional space that is congruent to a Euclidean space of lower dimension.
13.nounA straw hat, broad-brimmed and low-crowned.
14.nounA flat sheet for use on a bed.
15.nounA platform on a wheel, upon which emblematic designs etc. are carried in processions.
16.nounA horizontal vein or ore deposit auxiliary to a main vein; also, any horizontal portion of a vein not elsewhere horizontal.
17.nounA dull fellow; a simpleton.
18.noun(technical, theatre) A rectangular wooden structure covered with masonite, lauan, or muslin that depicts a building or other part of a scene, also called backcloth and backdrop.
19.nounAny of various hesperiid butterflies that spread their wings open when they land.
20.nounAn early kind of toy soldier having a flat design.
21.verbTo make a flat call; to call without raising.
22.verbTo become flat or flattened; to sink or fall to an even surface.
23.verbTo fall from the pitch.
24.verbTo depress in tone, as a musical note; especially, to lower in pitch by half a tone.
25.verbTo make flat; to flatten; to level.
26.verbTo render dull, insipid, or spiritless; to depress.
27.adjectiveHaving no variations in height."The land around here is flat."
28.adjective(voice) Without variations in pitch.
29.adjectiveHaving small or invisible breasts and/or buttocks."That girl is completely flat on both sides."
30.adjective(note) Lowered by one semitone.
31.adjectiveOf a note or voice, lower in pitch than it should be."Your A string is too flat."
32.adjective(of a tire or other inflated object) Deflated, especially because of a puncture.
33.adjectiveUninteresting."The party was a bit flat."
34.adjective(of a carbonated drink) With all or most of its carbon dioxide having come out of solution so that the drink no longer fizzes or contains any bubbles.
35.adjectiveLacking acidity without being sweet.
36.adjective(of a battery) Unable to emit power; dead.
37.adjective(of a throw) Without spin; spinless.
38.adjectiveLacking liveliness or action; depressed; dull and boring."The dialogue in your screenplay is flat -- you need to make it more exciting."
39.adjectiveAbsolute; downright; peremptory."His claim was in flat contradiction to experimental results."
40.adjective(of a consonant) sonant; vocal, as distinguished from a sharp (non-sonant) consonant
41.adjective(grammar) 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"."Many flat adverbs, as in 'run fast', 'buy cheap', etc. are from Old English."
42.adjective(of a golf club) Having a head at a very obtuse angle to the shaft.
43.adjective(of certain fruits) Flattening at the ends.
44.adjective(authorship, especially of a character) Lacking in depth, substance, or believability; underdeveloped; one-dimensional."The author added a chapter to flesh out the books' flatter characters."
45.adjectiveFixed; unvarying."a flat fare on public transport"
46.adverbSo as to be flat."Spread the tablecloth flat over the table."
47.adverbBluntly."I asked him if he wanted to marry me and he turned me down flat."
48.adverb(with units of time, distance, etc) Not exceeding."He can run a mile in four minutes flat."
49.adverbCompletely."I am flat broke this month."
50.adverbDirectly; flatly.
51.adverbWithout allowance for accrued interest.