Question

what is a sermon ? how is it different from a lecture ?​

Answer 1

A sermon may be defined as a discourse for the purpose of religious instruction while lecture is discourse for the purose of instruction on any general topic and talk can be a formal as well as an informal discourse delivered to an audience.

Answer 2

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A sermon is an oration or lecture by a preacher. Sermons address a scriptural, theological, or moral topic, usually expounding on a type of belief, law, or behavior within both past and present contexts.