Source : Webster's Revised Unabridged Dictionary (1913)

Creditable \Cred"it*a*ble\ (-?-b'l), a.
   1. Worthy of belief. [Obs.]

            Divers creditable witnesses deposed.  --Ludlow.

   2. Deserving or possessing reputation or esteem; reputable;
      estimable.

            This gentleman was born of creditable parents.
                                                  --Goldsmith.

   3. Bringing credit, reputation, or honor; honorable; as, such
      conduct is highly creditable to him. --Macaulay.

            He settled him in a good creditable way of living.
                                                  --Arbuthnot.

Source : WordNet®

creditable
     adj : worthy of often limited commendation; "the student's effort
           on the essay--though not outstanding--was creditable"