Source : Webster's Revised Unabridged Dictionary (1913)

Indo-European \In`do-Eu`ro*pe"an\, a.
   Aryan; -- applied to the languages of India and Europe which
   are derived from the prehistoric Aryan language; also,
   pertaining to the people or nations who speak these
   languages; as, the Indo-European or Aryan family.

         The common origin of the Indo-European nations.
                                                  --Tylor.

Indo-European \In`do-Eu`ro*pe"an\
   A member of one of the Caucasian races of Europe or India
   speaking an Indo-European language.

         Professor Otto Schrader . . . considers that the oldest
         probable domicile of the Indo-Europeans is to be sought
         for on the common borderland of Asia and of Europe, --
         in the steppe country of southern Russia. --Census of
                                                  India, 1901.

Source : WordNet®

Indo-European
     n 1: a member of the prehistoric people who spoke Proto-Indo
          European [syn: {Aryan}]
     2: the family of languages that by 1000 BC were spoken
        throughout Europe and in parts of southwestern and
        southern Asia [syn: {Indo-European language}, {Indo-Hittite}]

Indo-European
     adj 1: of or relating to the Indo-European language family [syn: {Indo-Germanic}]
     2: of or relating to the former Indo-European people;
        "Indo-European migrations" [syn: {Indo-Aryan}, {Aryan}]