Is it wrong to wear your wedding gown from another marriage?  

i think it depends. if the gown is from mum or some relations who are very dear to you then i will not feel wrong about that.

I am not yet married but I have noticed back in our province that brides there never buy their own bridal gown and just borrow from neighbors who has it. I remember the bridal gown of my mother was borrowed several times. I think it's part of managing their wedding budget, so instead of buying, they just borrow, after all, the gown will become useless after the wedding.

I think there's nothing wrong with that as long as you like it and comfortable wearing it and appropriate to your planned ceremony.

I don't see anything wrong with it, I mean if you can afford to buy another, go right ahead. But I personally think that you may as well, especially in this day in age where we are in quite a terrible recession thing. Overall it's good to put the thing to use one more time if it has only been worn once. Saving you lots of money than buying a new one.