This is the 9230th most frequent German word.
mainline
The German word "mainline" does not exist; it is an English word referring to the primary route or system, often for transportation or communication.
In this sentence, 'mainline' ('Hauptleiter') refers to the primary leader or central figure in an organization.
Der Hauptleiter der Organisation ist sehr erfahren.
The mainline director of the organization is very experienced.
Here, 'mainline' ('Hauptstrecke') pertains to the main transit route in railway terminology.
Die Hauptstrecke der Eisenbahn wird ständig gewartet.
The mainline of the railroad is constantly maintained.
In this context, 'mainline' ('Hauptlinie') refers to the central or primary concept within an intellectual framework.