Source : Webster's Revised Unabridged Dictionary (1913)

Hierarchical \Hi`er*arch"ic*al\, a. [Cf. F. hi['e]rarchique.]
   Pertaining to a hierarchy. -- {Hi`er*arch`ic*al*ly}, adv.

Source : WordNet®

hierarchical
     adj : classified according to various criteria into successive
           levels or layers; "it has been said that only a
           hierarchical society with a leisure class at the top
           can produce works of art"; "in her hierarchical set of
           values honesty comes first" [syn: {hierarchal}, {hierarchic}]
           [ant: {nonhierarchical}]