Source : Webster's Revised Unabridged Dictionary (1913)

Lecture \Lec"ture\, v. t. [imp. & p. p. {Lectured} (-t[-u]rd);
   p. pr. & vb. n. {Lecturing}.]
   1. To read or deliver a lecture to.

   2. To reprove formally and with authority.

Source : WordNet®

lecturing
     n : teaching by giving a discourse on some subject (typically to
         a class) [syn: {lecture}]