Source : Webster's Revised Unabridged Dictionary (1913)

Linguist \Lin"guist\ (l[i^][ng]"gw[i^]st), n. [L. lingua tongue,
   speech, language: cf. F. linguiste.]
   1. A master of the use of language; a talker. [Obs.]

            I'll dispute with him; He's a rare linguist. --J.
                                                  Webster.

   2. A person skilled in languages.

            There too were Gibbon, the greatest historian, and
            Jones, the greatest linguist, of the age.
                                                  --Macaulay.

Source : WordNet®

linguist
     n 1: a specialist in linguistics [syn: {linguistic scientist}]
     2: a person who speaks more than one language [syn: {polyglot}]