the act of reducing, or state of being reduced; conversion to a given state or condition; diminution; conquest; as, the reduction of a body to powder; the reduction of things to order; the reduction of the expenses of government; the reduction of a rebellious province.-the act or process of reducing. see reduce, v. t., 6. and to reduce an equation, to reduce an expression, under reduce, v. t.-the correction of observations for known errors of instruments, etc.-the preparation of the facts and measurements of observations in order to deduce a general result.-the process of making a copy of something, as a figure, design, or draught, on a smaller scale, preserving the proper proportions.-the bringing of a syllogism in one of the so-called imperfect modes into a mode in the first figure.-the act, process, or result of reducing; as, the reduction of iron from its ores; the reduction of aldehyde from alcohol.-the operation of restoring a dislocated or fractured part to its former place.