What does although mean?
The definition of although
Al*though”, conj.
Etym: [All + though; OE. al thagh.]

Grant all this; be it that; supposing that; notwithstanding; though. Although all shall be offended, yet will no I. Mark xiv. 29.

Synonyms
— Although, Though. Although, which originally was perhaps more emphatic than though, is now interchangeable with it in the sense given above. Euphonic consideration determines the choice.