Source : Webster's Revised Unabridged Dictionary (1913)

Else \Else\, a. & pron. [OE. & AS. elles otherwise, gen. sing.
   of an adj. signifying other; akin to OHG. elles otherwise,
   OSw. ["a]ljes, Sw. eljest, Goth. aljis, adj., other, L.
   alius, Gr. ?. Cf. {Alias}, {Alien}.]
   Other; one or something beside; as, Who else is coming? What
   else shall I give? Do you expect anything else? ``Bastards
   and else.'' --Shak.

   Note: This word always follows its noun. It is usual to give
         the possessive form to else rather than to the
         substantive; as, somebody else's; no one else's. ``A
         boy who is fond of somebody else's pencil case.'' --G.
         Eliot. ``A suit of clothes like everybody else's.''
         --Thackeray.

Else \Else\, adv. & conj.
   1. Besides; except that mentioned; in addition; as, nowhere
      else; no one else.

   2. Otherwise; in the other, or the contrary, case; if the
      facts were different.

            For thou desirest not sacrifice; else would I give
            it.                                   --Ps. li. 16.

   Note: After `or', else is sometimes used expletively, as
         simply noting an alternative. ``Will you give thanks, .
         . . or else shall I?'' --Shak.

Source : WordNet®

else
     adj 1: other than what is under consideration or implied; "ask
            somebody else"; "I don't know what else to do"; "where
            else can we look?"
     2: more; "would you like anything else?"; "I have nothing else
        to say" [syn: {else(ip)}, {additional}]
     adv 1: additional to or different from this one or place or time or
            manner; "nobody else is here"; "she ignored everything
            else"; "I don't know where else to look"; "when else
            can we have the party?"; "couldn't decide how else it
            could be done"
     2: (usually used with `or') if not, then; "watch your step or
        else you may fall"; "leave or else I'll get angry"