ETYM Old Fren. tramontain, Italian tramontano, Latin transmontanus; trans across, beyond + mons, montis, mountain.
1. Being or coming from another country.
2. On or coming from the other side of the mountains (from the the speaker); SYN. transmontane.
Beyond the mountains; foreign; uncivilized.
(from) across the mountains; transalpine.

A cold dry wind that blows south out of the mountains into Italy and the western Mediterranean; SYN. tramontana.