The definition I've found is "a northern wind" blowing in Spain, France or Italy. There's an old Italian song, however, where the word is used and such a definition would make no sense. To my non-native ears, it sounds like some colloquial usage. The lyrics go something like this:
Mi piaccion nere, mi piaccion bionde, Mi piaccion tutte le donne al mondo, E per il pizzo di una sottana, Perdo sempre la tramontana. L'ho perduta e la perderò.
PS. Excuse me but my Italian is very poor so I have to write in English.