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lecturing[ noun ]teaching by giving a discourse on some subject (typically to a class)<noun.act> 
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.