When you do something similarly, you do it nearly the same way as someone else. At a school bake sale, you might decide to price your brownies similarly to your friend's Rice Krispie treats.
Use the adverb similarly to describe something that's done in a way that mirrors or almost duplicates something else. If one little boy dresses up in a red cape at preschool, his best friend might costume himself similarly, in a red scarf and crown. When your neighbor tells you about her vacation in Hawaii, you might be inspired to travel similarly. The word comes from the adjective similar, which means "resembling," and has a Latin root, similis, "like."