Source : Webster's Revised Unabridged Dictionary (1913)

Latter \Lat"ter\, a. [OE. later, l[ae]tter, compar. of lat late.
   See {Late}, and cf. {Later}.]
   1. Later; more recent; coming or happening after something
      else; -- opposed to {former}; as, the former and latter
      rain.

   2. Of two things, the one mentioned second.

            The difference between reason and revelation, and in
            what sense the latter is superior.    --I. Watts.

   3. Recent; modern.

            Hath not navigation discovered in these latter ages,
            whole nations at the bay of Soldania? --Locke.

   4. Last; latest; final. [R.] ``My latter gasp.'' --Shak.

   {Latter harvest}, the last part of the harvest.

   {Latter spring}, the last part of the spring of the year.
      --Shak.

Source : WordNet®

latter
     adj : referring to the second of two things or persons mentioned
           (or the last one or ones of several); "in the latter
           case" [syn: {latter(a)}] [ant: {former(a)}]

latter
     n : the second of two or the second mentioned of two; "Tom and
         Dick were both heroes but only the latter is remembered
         today" [ant: {former}]