narrow gauge
noun/ˈnærəʊ ɡeɪdʒ/
/ˈnærəʊ ɡeɪdʒ/
[uncountable]- a size of railway track that is not as wide as the standard track that is used in the UK and the US
- a narrow-gauge railway
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narrow gauge
Definition of narrow gauge noun from the Oxford Advanced Learner's Dictionary