You searched English word "Mainline" meaning in Arabic that is "الخطوط الرئيسية". Mainline is a Verb (used Without Object), Mainlined, Mainlining. Slang.. We Spell Mainline as [meyn-lahyn, -lahyn]. Mainline meaning in Arabic has been searched 870 ( eight hundred seventy ) times till today 08/08/2026. Get translation of the word Mainline in Urdu and Roman Urdu. Learn how to speak Mainline Word in Arabic and English. You may also find the meaning of Word Mainline in English to Arabic, Urdu, Spanish, French, German, Hindi and other languages.