noun a principal business or organization
adjective principal or most important
In the military, 'main line' can refer to the primary communication channel or route of attack.
In business, 'main line' can refer to the main phone number or contact information for a company.
In transportation, 'main line' refers to the primary route or track used for trains or buses.
In telecommunications, 'main line' can refer to the primary phone line or connection.
In utilities, 'main line' can refer to the primary pipeline or connection for water, gas, or electricity.
In the context of writing, 'main line' may refer to the primary plot or storyline of a novel, article, or script.
A psychologist may use 'main line' to describe the central theme or focus of a therapy session or treatment plan.
For a chef, 'main line' could refer to the primary cooking station or area in a restaurant kitchen where the main dishes are prepared.
In construction, 'main line' may refer to the primary pipeline or conduit that carries water, gas, or other utilities to a building.
For a software developer, 'main line' could refer to the core code or functionality of a program or application.