Source : Webster's Revised Unabridged Dictionary (1913)

Honorable \Hon"or*a*ble\, a. [F. honorable, L. honorabilis.]
   1. Worthy of honor; fit to be esteemed or regarded;
      estimable; illustrious.

            Thy name and honorable family.        --Shak.

   2. High-minded; actuated by principles of honor, or a
      scrupulous regard to probity, rectitude, or reputation.

   3. Proceeding from an upright and laudable cause, or directed
      to a just and proper end; not base; irreproachable; fair;
      as, an honorable motive.

            Is this proceeding just and honorable? --Shak.

   4. Conferring honor, or produced by noble deeds.

            Honorable wounds from battle brought. --Dryden.

   5. Worthy of respect; regarded with esteem; to be commended;
      consistent with honor or rectitude.

            Marriage is honorable in all.         --Heb. xiii.
                                                  4.

   6. Performed or accompanied with marks of honor, or with
      testimonies of esteem; an honorable burial.

   7. Of reputable association or use; respectable.

            Let her descend: my chambers are honorable. --Shak.

   8. An epithet of respect or distinction; as, the honorable
      Senate; the honorable gentleman.

   Note: Honorable is a title of quality, conferred by English
         usage upon the younger children of earls and all the
         children of viscounts and barons. The maids of honor,
         lords of session, and the supreme judges of England and
         Ireland are entitled to the prefix. In American usage,
         it is a title of courtesy merely, bestowed upon those
         who hold, or have held, any of the higher public
         offices, esp. governors, judges, members of Congress or
         of the Senate, mayors.

   {Right honorable}. See under {Right}.

Source : WordNet®

honorable
     adj 1: not disposed to cheat or defraud; not deceptive or
            fraudulent; "honest lawyers"; "honest reporting"; "an
            honest wage"; "honest weight" [syn: {honest}] [ant: {dishonest}]
     2: showing or characterized by honor and integrity; "an
        honorable man"; "led an honorable life"; "honorable
        service to his country" [syn: {honourable}] [ant: {dishonorable}]
     3: used as a title of respect; "my honorable colleague"; "our
        worthy commanding officer" [syn: {honourable}]
     4: adhering to ethical and moral principles; "it seems ethical
        and right"; "followed the only honorable course of
        action"; "had the moral courage to stand alone" [syn: {ethical},
         {honourable}, {moral}]
     5: deserving of esteem and respect; "all respectable companies
        give guarantees"; "ruined the family's good name" [syn: {estimable},
         {good}, {respectable}]