Source : Webster's Revised Unabridged Dictionary (1913)

Priest \Priest\, n. [OE. prest, preost, AS. pre['o]st, fr. L.
   presbyter, Gr. ? elder, older, n., an elder, compar. of ? an
   old man, the first syllable of which is probably akin to L.
   pristinus. Cf. {Pristine}, {Presbyter}.]

Priest \Priest\, v. t.
   To ordain as priest.

Source : WordNet®

priest
     n 1: a clergyman in Christian churches who has the authority to
          perform or administer various religious rites; one of
          the Holy Orders
     2: a spiritual leader in a non-Christian religion [syn: {non-Christian
        priest}]