Fillan noun1 •A river, the River Fillan in Stirling council area, Scotland, which forms an upper section of the River Tay above Loch Dochart, through Strath Fillan and Crianlarich.With Ben More in the distance, West Coast Railways 37668 pilots 37669 over the River Fillan on the approach to Crianlarich on July 26. — 2021
