1. a person who makes moral judgments or lectures others about morality, especially in a self-righteous or tedious way
Usage: often used with a critical or disapproving tone

Examples

• He came across as a moraliser, constantly criticizing others for their choices.
• The politician was dismissed as a moraliser who failed to practice what he preached.
• She didn't appreciate being lectured by a moraliser who had no real understanding of her situation.
• The book's protagonist is a self-appointed moraliser who alienates everyone around him.
• Rather than being a moraliser, he preferred to lead by example.
• The moraliser's sanctimonious tone made his advice difficult to accept.