(1):

(n.) 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.

(2):

(n.) A devoting or setting aside for any particular purpose; as, a dedication of lands to public use.

(3):

(n.) An address to a patron or friend, prefixed to a book, testifying respect, and often recommending the work to his special protection and favor.