Source : Webster's Revised Unabridged Dictionary (1913)

Arch \Arch\, v. t. [imp. & p. p. {Arched}; p. pr. & vb. n.
   {Arching}.]
   1. To cover with an arch or arches.

   2. To form or bend into the shape of an arch.

            The horse arched his neck.            --Charlesworth.

Arched \Arched\, a.
   Made with an arch or curve; covered with an arch; as, an
   arched door.

Source : WordNet®

arched
     adj 1: constructed with or in the form of an arch or arches; "an
            arched passageway"
     2: forming or resembling an arch; "an arched ceiling" [syn: {arced},
         {arching}, {arciform}, {arcuate}, {bowed}]