An exposition of a given subject delivered before an audience or a class, as for the purpose of instruction.
An earnest admonition or reproof; a reprimand.
v.
lec·tured, lec·tur·ing, lec·tures
v.
intr. To deliver a lecture or series of lectures. v.
tr.
To deliver a lecture to (a class or an audience).
To admonish or reprove earnestly, often at length: always lecturing me about my manners.
[Middle English, a reading, from Old French, from Medieval Latin lēctūra, from Latin lēctus, past participle of legere, to read; see leg- in Indo-European roots.]
[lek-cher] 
noun, verb, -tured, -tur⋅ing.
tʃər