The Collaborative International Dictionary of English v.0.48:

Dedication \Ded`i*ca"tion\, 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]

Moby Thesaurus II by Grady Ward, 1.0:

179 Moby Thesaurus words for "dedication":
   abandon, acknowledgments, address, adherence, allegiance, altruism,
   ardency, ardor, assigned task, assignment, back, back matter,
   bastard title, beatification, beatitude, bibliography, blessedness,
   blessing, bounden duty, burden, business, call of duty,
   canonization, catch line, catchword, charge, colophon, commitment,
   committedness, consecration, constancy, contents, contents page,
   copyright page, decidedness, decision, decisiveness, deference,
   definiteness, determinateness, determination, determinedness,
   devoir, devotedness, devotion, devoutness, disinterest,
   disinterestedness, duties and responsibilities, duty, earnestness,
   endleaf, endpaper, endsheet, enshrinement, errata, ethics,
   exaltation, faith, faithfulness, fastness, fealty, fervency,
   fervidness, fervor, fidelity, fire, firmness, fixedness, flyleaf,
   folio, fore edge, foreword, front matter, glorification, grace,
   half-title page, hallowing, head, heartiness, heat, heatedness,
   homage, humility, impassionedness, imperative, imprint, index,
   inscription, intensity, intentness, introduction, justification,
   justification by works, leaf, line of duty, loyalty, makeup,
   message, mission, modesty, must, obligation, obstinacy, onus,
   ordainment, ordination, ought, page, passion, passionateness,
   perseverance, persistence, place, pledge, preface, preliminaries,
   purification, purpose, purposefulness, recto, relentlessness,
   resoluteness, resolution, resolve, resolvedness, respect, reverso,
   running title, sacrifice, sainthood, sainting, sanctification,
   self-abasement, self-abnegation, self-denial, self-devotion,
   self-effacement, self-forgetfulness, self-immolation,
   self-imposed duty, self-neglect, self-neglectfulness,
   self-renouncement, self-sacrifice, self-subjection, self-will,
   selflessness, seriousness, setting apart, signature, sincerity,
   single-mindedness, spirit, state of grace, staunchness,
   steadfastness, subtitle, table of contents, tail, tenacity, text,
   title, title page, total commitment, tried-and-trueness, triedness,
   trim size, trueness, type page, unacquisitiveness,
   unpossessiveness, unselfishness, vehemence, verso, warmth,
   wholeheartedness, will, zeal