flat
adjective
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lacking taste or flavor or tangblandinsipidvapidflavorlessflavourlesssavorlesssavourless
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flattened laterally along the whole length (e.g., certain leafstalks or flatfishes)compressed
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commercially inactive“flat sales for the month”
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not reflecting lightmattedmatmattmatte
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having a relatively broad surface in relation to depth or thickness“flat computer monitors”
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lacking the expected range or depthtwo-dimensional
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having a surface without slope, tilt in which no part is higher or lower than another“a flat desk”levelplane
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lacking contrast or shading between tones
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horizontally level“a flat roof”
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stretched out and lying at full length along the ground“found himself lying flat on the floor”prostrate
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sounded or spoken in a tone unvarying in pitchmonotonousmonotonemonotonic
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(of a musical note) lowered in pitch by one chromatic semitone
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not modified or restricted by reservationsunconditionalcategoriccategorical
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having lost effervescence“flat beer”
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lacking stimulating characteristicsbland
noun
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a suite of rooms usually on one floor of an apartment houseapartment
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scenery consisting of a wooden frame covered with painted canvas
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a deflated pneumatic tireflat tire
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a shallow box in which seedlings are started
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freight car without permanent sides or roofflatbedflatcar
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a musical notation indicating one half step lower than the note named
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a level tract of land“the salt flats of Utah”
adverb
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in a forthright mannerstraight
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with flat sails“sail flat against the wind”