From GNU Collaborative International Dictionary of English, version 0.54:
Dedication (?), n. [L. dedicatio.]
1. The act of setting apart or consecrating to a divine Being, or to a sacred use, often with religious solemnities; solemn appropriation; as, “the dedication of Solomon's temple”.
[1913 Webster]
2. A devoting or setting aside for any particular purpose; as, “a dedication of lands to public use”.
[1913 Webster]
3. An address to a patron or friend, prefixed to a book, testifying respect, and often recommending the work to his special protection and favor.
[1913 Webster]