Source : Webster's Revised Unabridged Dictionary (1913)

Seer \Seer\ (s[=e]r), a.
   Sore; painful. [Prov. Eng.] --Ray.

Seer \Se"er\ (s[=e]"[~e]r), n.
   One who sees. --Addison.

Seer \Seer\ (s[=e]r), n. [From {See}.]
   A person who foresees events; a prophet. --Milton.

Source : WordNet®

seer
     n 1: a person with unusual powers of foresight [syn: {visionary},
           {illusionist}]
     2: an observer who perceives visually; "an incurable seer of
        movies"
     3: an authoritative person who divines the future [syn: {prophet},
         {oracle}, {vaticinator}]