Source : Webster's Revised Unabridged Dictionary (1913)

Precentor \Pre*cen"tor\, n. [L. praecentor, fr. praecinere to
   sing before; prae before + canere to sing. See {Chant}.]
   A leader of a choir; a directing singer. Specifically:
   (a) The leader of the choir in a cathedral; -- called also
       the {chanter} or master of the choir. --Hook.
   (b) The leader of the congregational singing in Scottish and
       other churches.

Source : WordNet®

precentor
     n : the musical director of a choir [syn: {choirmaster}, {cantor}]