Manner refers to the way in which something is done or how something happens. A manor is a large house that is part of an estate.

If you talk about the correct manner to make a quilt, you're talking about the right way to sew a quilt together. This definition of manner relates to the original sense of the word, which was derived from the Latin word manus, meaning "hand." When you say that someone has good manners, you're using a closely related meaning — you're saying that someone is behaving in the right way according to social norms or expectations. Here are some appropriate examples of manner:

"Thank you to all students and parents for the calm manner in which they helped to handle the situation," the school added. (BBC)

By all accounts, Andre was a model British officer with impeccable manners, who had the misfortune to be caught doing his duty. (Founding Brothers: The Revolutionary Generation)

Manor, on the other hand, refers to a large dwelling that someone lives in. It comes from an Old French word that means "mansion, home or abode," which can help you remember the meaning: manor has an "o" in it, just like mansion, home and abode do! Here are some examples that illustrate the use of manor:

Johnson also offered to invest an additional $10 million or more to restore River Farm's gardens and renovate its manor. (The Washington Post)

"You expect to make it to the earl's manor in four days?" he asked quietly. (The Name of the Wind)

So, next time you get invited to a fancy party at a manor, look around and see if the guests have good manners.