1. in a manner that gives moral advice or instruction in an annoying or self-righteous way
Usage: often implies condescension or unwanted lecturing

Examples

• She spoke preachingly about the importance of exercise while eating a donut.
• The politician addressed the crowd preachingly, as if they were children.
• He preachingly explained why everyone should recycle more.
• The teacher talked preachingly about punctuality despite being late herself.
• She preachingly criticized their spending habits.
• The boss preachingly lectured about teamwork while taking all the credit.