Source : Webster's Revised Unabridged Dictionary (1913)

Dimensional \Di*men"sion*al\, a.
   Pertaining to dimension.

Source : WordNet®

dimensional
     adj 1: of or relating to dimensions
     2: having dimension--the quality or character or stature proper
        to a person; "never matures as a dimensional character; he
        is pasty, bland, faceless"- Norman Cousins