Meaning of “preach” - Learner’s Dictionary

preach

verb uk us /priːtʃ/
RELIGION [ I, T ]

to talk to a group of people about a religious subject, usually as a priest in a church:

to preach the gospel
Many people had come to hear him preach.
PERSUADE [ I ]

to try to persuade people to believe or support something, often in an annoying way

→ See also practise what you preach

(Definition of “preach” from the Cambridge Learner’s Dictionary © Cambridge University Press)