To dedicate is to assign, to commit or to give over. If you dedicate a song you’ve written to a friend, it means the song belongs to them. If you dedicate yourself to a project, it means you give yourself to it.
Things you may be dedicated to include your family, improving your local park, or attempting to break the world record for making the world's biggest rubber band ball. A dedicated resource is one committed to a specific mission, such as the computer room at your school being dedicated, or given over, to newspaper production every Tuesday afternoon.