expression, godan verb (-ru)
mind one's manners; follow the rules; be civil
Used when someone behaves politely according to social norms or specific rules of conduct. Often heard as a reminder or expectation.
公共の場ではマナーを守りましょう。
Let's mind our manners in public places.
彼はいつもマナーを守って行動する。
He always acts with good manners.