Source : Webster's Revised Unabridged Dictionary (1913)

Teach \Teach\, v. t. [imp. & p. p. {Taught}; p. pr. & vb. n.
   {Teaching}.] [OE. techen, imp. taughte, tahte, AS. t?cean,
   imp. t?hte, to show, teach, akin to t[=a]cn token. See
   {Token}.]
   1. To impart the knowledge of; to give intelligence
      concerning; to impart, as knowledge before unknown, or
      rules for practice; to inculcate as true or important; to
      exhibit impressively; as, to teach arithmetic, dancing,
      music, or the like; to teach morals.

            If some men teach wicked things, it must be that
            others should practice them.          --South.

   2. To direct, as an instructor; to manage, as a preceptor; to
      guide the studies of; to instruct; to inform; to conduct
      through a course of studies; as, to teach a child or a
      class. ``He taught his disciples.'' --Mark ix. 31.

            The village master taught his little school.
                                                  --Goldsmith.

   3. To accustom; to guide; to show; to admonish.

            I shall myself to herbs teach you.    --Chaucer.

            They have taught their tongue to speak lies. --Jer.
                                                  ix. 5.

   Note: This verb is often used with two objects, one of the
         person, the other of the thing; as, he taught me Latin
         grammar. In the passive construction, either of these
         objects may be retained in the objective case, while
         the other becomes the subject; as, I was taught Latin
         grammar by him; Latin grammar was taught me by him.

   Syn: To instruct; inform; inculcate; tell; guide; counsel;
        admonish. See the Note under {Learn}.

Taught \Taught\, a.
   See {Taut}. --Totten.

Taught \Taught\,
   imp. & p. p. of {Teach}. [AS. imp. t[=ae]hte, p. p.
   get[=ae]ht.]

   Note: See {Teach}.

Source : WordNet®

taught
     adj : (all used chiefly with qualifiers `well' or `poorly' or
           `un-') having received specific instruction;
           "unschooled ruffians"; "well tutored applicants" [syn:
           {instructed}, {schooled}, {tutored}]

taught
     See {teach}