Yes the word पुराना means old. But if you are asking your doubt about the Hindi word पुराण, which has a similar pronounciation , then here's the meaning-
¹It usually means the collection of Indian mythologies/literature based on deities, like Ramayana, Mahabharata ,etc.
²If you take the word पुराण in Sanskrit , then the word would again mean old/ancient. I believe the Hindi word for old , i.e, पुराना derived from this Sanskrit word.