Dhamma (Dharma) is a concept generally known as ‘the teachings of the Buddha.’ Following Buddhist teachings gives many people meaning and understanding within their day to day lives.
A sermon is an oration or lecture by a preacher (who is usually a Buddhist monk/clergy). Sermons address a scriptural, theological, or moral topic, usually expounding on a type of belief, law, or behaviour within both past and present contexts. The act of delivering a sermon is also called dhamma preaching.