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Definition of reduce (Meaning of reduce)
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Reduce Re*duce" (r[-e]*d[=u]s"), v. t. [imp. & p. p. {Reduced}
	     (-d[=u]st"),; p. pr. & vb. n. {Reducing} (-d[=u]"s[i^]ng).]
	     [L. reducere, reductum; pref. red-. re-, re- + ducere to
	     lead. See {Duke}, and cf. {Redoubt}, n.]
	     1. To bring or lead back to any former place or condition.
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	              And to his brother's house reduced his wife.
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	              The sheep must of necessity be scattered, unless the
	              great Shephered of souls oppose, or some of his
	              delegates reduce and direct us.       --Evelyn.
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	     2. To bring to any inferior state, with respect to rank,
	        size, quantity, quality, value, etc.; to diminish; to
	        lower; to degrade; to impair; as, to reduce a sergeant to
	        the ranks; to reduce a drawing; to reduce expenses; to
	        reduce the intensity of heat. ``An ancient but reduced
	        family.'' --Sir W. Scott.
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	              Nothing so excellent but a man may fasten upon
	              something belonging to it, to reduce it.
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	              Having reduced
	              Their foe to misery beneath their fears. --Milton.
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	              Hester Prynne was shocked at the condition to which
	              she found the clergyman reduced.      --Hawthorne.
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	     3. To bring to terms; to humble; to conquer; to subdue; to
	        capture; as, to reduce a province or a fort.
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	     4. To bring to a certain state or condition by grinding,
	        pounding, kneading, rubbing, etc.; as, to reduce a
	        substance to powder, or to a pasty mass; to reduce fruit,
	        wood, or paper rags, to pulp.
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	              It were but right
	              And equal to reduce me to my dust.    --Milton.
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	     5. To bring into a certain order, arrangement,
	        classification, etc.; to bring under rules or within
	        certain limits of descriptions and terms adapted to use in
	        computation; as, to reduce animals or vegetables to a
	        class or classes; to reduce a series of observations in
	        astronomy; to reduce language to rules.
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	     6. (Arith.)
	        (a) To change, as numbers, from one denomination into
	            another without altering their value, or from one
	            denomination into others of the same value; as, to
	            reduce pounds, shillings, and pence to pence, or to
	            reduce pence to pounds; to reduce days and hours to
	            minutes, or minutes to days and hours.
	        (b) To change the form of a quantity or expression without
	            altering its value; as, to reduce fractions to their
	            lowest terms, to a common denominator, etc.
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	     7. (Chem.) To add an electron to an atom or ion.
	        Specifically: To remove oxygen from; to deoxidize.
	        (Metallurgy) To bring to the metallic state by separating
	        from combined oxygen and impurities; as, metals are
	        reduced from their ores. (Chem.) To combine with, or to
	        subject to the action of, hydrogen or any other reducing
	        agent; as, ferric iron is reduced to ferrous iron;
	        aldehydes can be reduced to alcohols by lithium hydride;
	        -- opposed to {oxidize}.
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	     8. (Med.) To restore to its proper place or condition, as a
	        displaced organ or part; as, to reduce a dislocation, a
	        fracture, or a hernia.
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	     {Reduced iron} (Chem.), metallic iron obtained through
	        deoxidation of an oxide of iron by exposure to a current
	        of hydrogen or other reducing agent. When hydrogen is used
	        the product is called also {iron by hydrogen}.
	     {To reduce an equation} (Alg.), to bring the unknown quantity
	        by itself on one side, and all the known quantities on the
	        other side, without destroying the equation.
	     {To reduce an expression} (Alg.), to obtain an equivalent
	        expression of simpler form.
	     {To reduce a square} (Mil.), to reform the line or column
	        from the square.
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	     Syn: To diminish; lessen; decrease; abate; shorten; curtail;
	          impair; lower; subject; subdue; subjugate; conquer.
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From The Collaborative International Dictionary of English v.0.44
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