1. The most common railway track spacing of 1,435 millimeters (4 feet 8.5 inches) between the inner rails, adopted as the international standard for most railway systems
Most European and Asian railways use standard gauge tracks.
A maioria das ferrovias europeias e asiáticas utiliza trilhos de bitola padrão.
2. A model railroad or toy train that operates on tracks with this standardized spacing
He collects standard gauge model trains from the 1950s.
Ele coleciona trens em escala de bitola padrão dos anos 1950.