Source : Webster's Revised Unabridged Dictionary (1913)

Monarchal \Mo*nar"chal\, a.
   Pertaining to a monarch; suiting a monarch; sovoreign; regal;
   imperial.

         Satan, whom now transcendent glory raised Above his
         fellows, with monarchal pride.           --Milton.

Source : WordNet®

monarchal
     adj 1: of or relating to or befitting a monarch or monarchy;
            "monarchal (or monarchical) government"; "a country
            that was monarchial in tradition"; "reconciled to
            monarchic rule"; "monarchical systems" [syn: {monarchial},
             {monarchic}, {monarchical}]
     2: having the characteristics of or befitting or worthy of a
        monarch; "monarchical gestures"; "monarchal pomp" [syn: {monarchical}]
     3: ruled by or having the supreme power resting with a monarch;
        "monarchal government"; "monarchical systems" [syn: {monarchical},
         {monarchic}]