Definition
To do something 'rightly' means to do it correctly, properly, and according to what is morally just or appropriate. It implies adhering to a standard of correctness or righteousness. Think of it as following the rules of a game accurately and fairly. It's the opposite of doing something wrong or incorrectly. For example, if you answer a question rightly on a test, you get the point. It can also mean morally justified, like rightly defending someone in need.