Meaning of ALTHOUGH in English
(also US informal altho ) / ɔːlˈðəʊ; NAmE ɔːlˈðoʊ/ conjunction
used for introducing a statement that makes the main statement in a sentence seem surprising
SYN though :
Although the sun was shining it wasn't very warm.
Although small, the kitchen is well designed.
used to mean 'but' or 'however' when you are commenting on a statement :
I felt he was wrong, although I didn't say so at the time.
although / even though / though
You can use these words to show contrast between two clauses or two sentences. Though is used more in spoken than in written English. You can use although , even though and though at the beginning of a sentence or clause that has a verb. Notice where the commas go:
Although/Even though/Though everyone played well, we lost the game.
We lost the game, although / even though / though everyone played well.
You cannot use even on its own at the beginning of a sentence or clause instead of although , even though or though : Even everyone played well, we lost the game.
Middle English : from the adverb all + though .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005