If you say that someone has dedicated themselves to something, you approve of the fact that they have decided to give a lot of time and effort to it because they think that it is important.

If someone dedicates something such as a book, play, or piece of music to you, they mention your name, for example in the front of a book or when a piece of music is performed, as a way of showing affection or respect for you.

If a building or church is dedicated to someone, a formal ceremony is held to show that the building will always be associated with them.