Mannerly means having or showing good manners. A mannerly person knows how to behave politely in different situations: saying “please” and “thank you,” listening when others speak, waiting their turn, and treating people with respect.

Being mannerly is about making others feel comfortable and valued through genuine consideration. A mannerly guest at dinner waits for everyone to be served before eating and keeps their mouth closed while chewing. A mannerly student raises their hand instead of shouting out answers. These small acts of consideration make life smoother for everyone.

The word suggests consistent behavior, not just occasional politeness. Someone might act polite when their parents are watching but be rude when they're not. That's not truly mannerly. A mannerly person treats the cafeteria worker with the same courtesy they show their teacher and speaks kindly to younger kids even when no adults are around.