transcription, транскрипция: [ meɪnlaɪn ]
1.
A mainline railway is a major railway between two important places.
...the first mainline railway to be built in Britain for almost a hundred years...
...London’s mainline stations.
ADJ : ADJ n
2.
You can use mainline to describe people, ideas, and activities that belong to the most central, conventional, and normal part of a tradition, institution, or business.
We observe a striking shift away from a labor theory among all mainline economists...
= mainstream
ADJ : ADJ n