The Collaborative International Dictionary of English v.0.48:

Pedagogue \Ped"a*gogue\ (p[e^]d"[asl]*g[o^]g), n. [F.
   p['e]dagogue, L. paedagogus, Gr. paidagwgo`s; pai^s, paido`s,
   a boy + 'a`gein to lead, guide; cf. 'agwgo`s leading. See
   Page a servant, Agent.]
   1. (Gr. Antiq.) A slave who led his master's children to
      school, and had the charge of them generally.
      [1913 Webster]

   2. A teacher of children; one whose occupation is to teach
      the young; a schoolmaster.
      [1913 Webster]

   3. One who by teaching has become formal, positive, or
      pedantic in his ways; one who has the manner of a
      schoolmaster; a pedant. --Goldsmith.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pedagogue \Ped"a*gogue\, v. t. [Cf. L. paedagogare to instruct.]
   To play the pedagogue toward. [Obs.] --Prior.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pedagogue
    n 1: someone who educates young people [syn: educator,
         pedagogue, pedagog]

Moby Thesaurus II by Grady Ward, 1.0:

28 Moby Thesaurus words for "pedagogue":
   abecedarian, certified teacher, docent, doctor, dominie, don,
   educationist, educator, fellow, guide, guru, instructor, maestro,
   master, melamed, mentor, mullah, pandit, pedagogist, preceptor,
   professor, pundit, rabbi, schoolkeeper, schoolmaster,
   schoolteacher, starets, teacher