flat [ˈflæt]

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¹ flat adjective

• having a smooth, level, or even surface : not having curves or bumps
• having a wide, smooth surface and little thickness
• very low and wide; also, of a shoe : having a flat heel or no heel

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² flat noun

• a level area of land—usually plural
• a flat part or surface
• a musical note that is one semitone lower than a specified note

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³ flat adverb

• on or against a flat surface
• in the position of someone or something that is lying spread out on the ground or another surface
• exactly or precisely—used to describe something that happens quickly