<p><b>6.</b> <fld>(Mining)</fld> <def>A horizontal vein or ore deposit auxiliary to a main vein; also, any horizontal portion of a vein not elsewhere horizontal.</def>
<i>Raymond.</i>
<p><b>7.</b> <def>A dull fellow; a simpleton; a numskull.</def> <mark>[Colloq.]</mark>
<blockquote>Or if you can not make a speech, Because you are a <b>flat</b>. <i>Holmes.</i></blockquote>
<p><b>8.</b> <fld>(Mus.)</fld> <def>A character [♭] before a note, indicating a tone which is a half step or semitone lower.</def>
<p><b>9.</b> <fld>(Geom.)</fld> <def>A homaloid space or extension.</def>
<h1>Flat</h1> <Xpage=568>
<hw>Flat</hw> <tt>(?)</tt>, <tt>v. t.</tt> <wordforms>[<tt>imp. & p. p.</tt> <er>Flatted</er> <tt>(?)</tt>; <tt>p. pr. & vb. n.</tt> <er>Flatting</er> <tt>(?)</tt>.]</wordforms> <p><b>1.</b> <def>To make flat; to flatten; to level.</def>
<p><b>2.</b> <def>To render dull, insipid, or spiritless; to depress.</def>
<blockquote>Passions are allayed, appetites are <b>flatted</b>. <i>Barrow.</i></blockquote>
<p><b>3.</b> <def>To depress in tone, as a musical note; especially, to lower in pitch by half a tone.</def>
<h1>Flat</h1> <Xpage=568>
<hw>Flat</hw>, <tt>v. i.</tt> <p><b>1.</b> <def>To become flat, or flattened; to sink or fal to an even surface.</def>
<i>Sir W. Temple.</i>
<p><b>2.</b> <fld>(Mus.)</fld> <def>To fall form the pitch.</def>
<cs><col>To flat out</col>, <cd>to fail from a promising beginning; to make a bad ending; to disappoint expectations. <mark>[Colloq.]</mark></cd></cs><-- = to fall flat -->
<h1>Flatbill</h1> <Xpage=568>
<hw>Flat"bill`</hw> <tt>(?)</tt>, <tt>n.</tt> <fld>(Zo\'94l.)</fld> <def>Any bird of the genus <spn>Flatyrynchus</spn>. They belong to the family of flycatchers.</def>
<h1>Flatboat</h1> <Xpage=568>
<hw>Flat"boat`</hw> <tt>(?)</tt>, <tt>n.</tt> <def>A boat with a flat bottom and square ends; -- used for the transportation of bulky freight, especially in shallow waters.</def>
<h1>Flat-bottomed</h1> <Xpage=568>
<hw>Flat"-bot`tomed</hw> <tt>(?)</tt>, <tt>a.</tt> <def>Having an even lower surface or bottom; <as>as, a <ex>flat-bottomed</ex> boat</as>.</def>
<h1>Flat-cap</h1> <Xpage=568>
<hw>Flat"-cap`</hw> <tt>(?)</tt>, <tt>n.</tt> <def>A kind of low-crowned cap formerly worn by all classes in England, and continued in London after disuse elsewhere; -- hence, a citizen of London.</def>
<i>Marston.</i>
<h1>Flatfish</h1> <Xpage=568>
<hw>Flat"fish`</hw> <tt>(?)</tt>, <tt>n.</tt> <fld>(Zo\'94l.)</fld> <def>Any fish of the family <spn>Pleuronectid\'91</spn>; esp., the winter flounder (<spn>Pleuronectes Americanus</spn>). The flatfishes have the body flattened, swim on the side, and have eyes on one side, as the flounder, turbot, and halibut. See <er>Flounder</er>.</def>
<h1>Flat foot</h1> <Xpage=568>
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