Preach meaning

to speak in public on religious matters; give a sermon

to try to persuade other people to believe in a particular belief

to deliver (a sermon)

deliver a sermon or religious address to an assembled group of people, typically in church.

Ex. "he preached to a large congregation"

publicly proclaim or teach (a religious message or belief).

Ex. "he preached the word of God"

Earnestly advocate (a belief or course of action).

give moral advice to someone in a pompously self-righteous way.

Ex. "viewers want to be entertained, not preached at"

used to affirm one's approval of or support for a stated opinion, advocated course of action, etc.

Ex. "‘Please continue to speak up if you see bullying—it could save another's life.’ ‘Preach!’"