Numinous is an English word. In German it means numinous. Although I have some knowledge of German, this googled translation did not help me understand the term. I learned from Wikipedia that numinous is based on the Latin word numen. According to Wikipedia, this in turn means either hint, command, will or divine will. Apparently, numen and numinous in German are also technical terms used in religious theory to describe "the presence of a formless divine being". There was also an ancient Roman cult that dealt with the concept and was concerned with the god-like worship of the emperor Augustus in particular. Whether Augustus was shapeless or divine or both was not immediately clear to me during my superficial internet research.
Well. I interpret Numinous as the title of a ski film as a vague term somewhere between spiritual transcendence with a reference to nature and "Boah dude, mountains are so cool, yo!"
The latter is beautifully demonstrated in Numinous. The film is a declaration of love to the mountains of British Columbia, from melt-in-your-mouth pillows to jagged peaks bathed in pink evening light and steep ice walls.