Source : Webster's Revised Unabridged Dictionary (1913)

Cismontane \Cis*mon"tane\, a. [Pref. cis- + L. mons mountain.]
   On this side of the mountains. See under {Ultramontane}.

Source : WordNet®

cismontane
     adj : on this (the speaker's) side of the mountains; "a contest in
           Virginia between a cismontane and a tramontane people"
           [ant: {tramontane}]