A chair = egy szek?
Correct :)
Why do we have to use the definite article in English for "a/az" if these articles are indefinite articles is Hungarian? There should be an option to either use indefinite "a/an" in English or no article at all.
a / az is the definite article in Hungarian. So a szék is unquestionably "the chair", not "a chair" and not simply "chair" either.
Nagggyon fullos hangminőség