The Collaborative International Dictionary of English v.0.48:

Dedicate \Ded"i*cate\, p. a. [L. dedicatus, p. p. of dedicare to
   affirm, to dedicate; de- + dicare to declare, dedicate; akin
   to dicere to say. See Diction.]
   Dedicated; set apart; devoted; consecrated. "Dedicate to
   nothing temporal." --Shak.

   Syn: Devoted; consecrated; addicted.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dedicate \Ded"i*cate\, v. t. [imp. & p. p. Dedicated; p. pr. &
   vb. n. Dedicating.]
   1. To set apart and consecrate, as to a divinity, or for
      sacred uses; to devote formally and solemnly; as, to
      dedicate vessels, treasures, a temple, or a church, to a
      religious use.
      [1913 Webster]

            Vessels of silver, and vessels of gold, . . . which
            also king David did dedicate unto the Lord. --2 Sam.
                                                  viii. 10, 11.
      [1913 Webster]

            We have come to dedicate a portion of that field as
            a final resting place for those who here gave their
            lives that that nation might live. . . . But in a
            larger sense we can not dedicate, we can not
            consecrate, we can not hallow this ground. --A.
                                                  Lincoln.
      [1913 Webster]

   2. To devote, set apart, or give up, as one's self, to a duty
      or service.
      [1913 Webster]

            The profession of a soldier, to which he had
            dedicated himself.                    --Clarendon.
      [1913 Webster]

   3. To inscribe or address, as to a patron.
      [1913 Webster]

            He complied ten elegant books, and dedicated them to
            the Lord Burghley.                    --Peacham.

   Syn: See Addict.
        [1913 Webster]

WordNet (r) 3.0 (2006):

dedicate
    v 1: give entirely to a specific person, activity, or cause;
         "She committed herself to the work of God"; "give one's
         talents to a good cause"; "consecrate your life to the
         church" [syn: give, dedicate, consecrate, commit,
         devote]
    2: open to public use, as of a highway, park, or building; "The
       Beauty Queen spends her time dedicating parks and nursing
       homes"
    3: inscribe or address by way of compliment; "She dedicated her
       book to her parents"
    4: set apart to sacred uses with solemn rites, of a church

Moby Thesaurus II by Grady Ward, 1.0:

34 Moby Thesaurus words for "dedicate":
   address, allot, apply, appropriate, assign, beatify, bless,
   canonize, cleanse, commit, confide, consecrate, consign, devote,
   direct, enshrine, entrust, exalt, give, give over, give over to,
   give up, glorify, hallow, inscribe, offer, pledge, purify, saint,
   sanctify, set, set apart, surrender, yield