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Definition of main-line adjective from the Oxford Advanced Learner's Dictionary

main-line

adjective

/ˌmeɪn ˈlaɪn/

/ˌmeɪn ˈlaɪn/

[only before noun]

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on an important railway line between two cities
- a main-line station/train
Topics Transport by bus and trainb2

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main line noun

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verb

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C2

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