main line

1. The principal route of a transportation system (synset 103717436)
   is a type of: itinerary, path, route - an established line of travel or access

Other Searches

• Rhyme: Dillfrog, RhymeZone
• Definition: Wiktionary, Dictionary.com, Wikipedia, Merriam-Webster, WordNet, Power Thesaurus
• Imagery: Google, Flickr, Bing