WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / M / main line main line noun /meɪnlaɪn/ 9 letters Scrabble 10 WWF 14 Definitions noun the principal route of a transportation system Look “main line” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →