1. to deliver a sermon or preach
2. to speak in a preachy or moralizing manner
Usage: often disapproving

Examples

• The pastor sermonizes every Sunday morning.
• He sermonizes about the importance of hard work.
• She tends to sermonize whenever someone makes a mistake.
• The politician sermonizes about family values during his campaign.
• My grandfather always sermonizes about the good old days.
• The teacher sermonizes about proper behavior in class.