Source : Webster's Revised Unabridged Dictionary (1913)

Each \Each\ ([=e]ch), a. or a. pron. [OE. eche, [ae]lc, elk,
   ilk, AS. [ae]lc; [=a] always + gel[=i]c like; akin to OD.
   iegelik, OHG. [=e]ogil[=i]h, MHG. iegel[=i]ch, G. jeglich.
   [root]209. See 3d {Aye}, {Like}, and cf. {Either}, {Every},
   {Ilk}.]
   1. Every one of the two or more individuals composing a
      number of objects, considered separately from the rest. It
      is used either with or without a following noun; as, each
      of you or each one of you. ``Each of the combatants.''
      --Fielding.

   Note: To each corresponds other. ``Let each esteem other
         better than himself.'' Each other, used elliptically
         for each the other. It is our duty to assist each
         other; that is, it is our duty, each to assist the
         other, each being in the nominative and other in the
         objective case.

               It is a bad thing that men should hate each
               other; but it is far worse that they should
               contract the habit of cutting one another's
               throats without hatred.            --Macaulay.

               Let each His adamantine coat gird well. --Milton.

               In each cheek appears a pretty dimple. --Shak.

               Then draw we nearer day by day, Each to his
               brethren, all to God.              --Keble.

               The oak and the elm have each a distinct
               character.                         --Gilpin.

   2. Every; -- sometimes used interchangeably with every.
      --Shak.

            I know each lane and every alley green. --Milton.

            In short each man's happiness depends upon himself.
                                                  --Sterne.

   Note: This use of each for every, though common in Scotland
         and in America, is now un-English. --Fitzed. Hall.

   Syn: See {Every}.

Source : WordNet®

each
     adj : (used of count nouns) every one considered individually;
           "each person is mortal"; "each party is welcome" [syn:
           {each(a)}]

each
     adv : to or from every one of two or more (considered
           individually); "they received $10 each" [syn: {to each
           one}, {for each one}, {from each one}, {apiece}]