GodsExchange.com

During a 2 player ranting session with a god fearing Christian the subject of miracles came up, and being the good little troll that I am, I decided that definitions were required. I asked the repository of all human knowledge

Magic

1. any art that invokes supernatural powers
2. magic trick: an illusory feat; considered magical by naive observers
3. charming: possessing or using or characteristic of or appropriate to supernatural powers; “charming incantations”; “magic signs that protect …

Miracle

1. any amazing or wonderful occurrence
2. a marvellous event manifesting a supernatural act of a divine agent

NB: not a really good argument for anything, just interesting, I suppose