Source : Webster's Revised Unabridged Dictionary (1913)

Functionary \Func"tion*a*ry\, n.; pl. {Functionaries}. [Cf. F.
   fonctionnaire.]
   One charged with the performance of a function or office; as,
   a public functionary; secular functionaries.

Source : WordNet®

functionary
     n : a worker who holds or is invested with an office [syn: {official}]