From Longman Dictionary of Contemporary Englishnarrow gaugeˈnarrow ˌgauge noun [countable, uncountable] TTTa size of railway track of less than standard width a narrow gauge railway
Examples from the Corpus
narrow gauge• He also built a narrow gauge railway which ran round the whole estate.• It is the latest shot in the battle to re-construct the 23-mile narrow gauge line.• The car rattled along, crossing the myriad narrow gauge loco tracks that ran between the factories lining the route.• At first glance there appears to be a preponderance of narrow gauge or what I would call miniature railways.• At the Port Lilla was placed back on narrow gauge track for the journey up to the Quarry.• Then the narrow gauge became the standard Voice over A rail system based on a horse's behind. 