Wikipedia, the online encyclopedia states that A veil is an article of clothing or cloth hanging that is intended to cover some part of the head or face, or an object of some significance. It is especially associated with women and sacred objects.
According to www.weddingvenueillinois.com Ancient Roman tradition brings us the veil. It was thought brides were desired by evil spirits and the veil would make them unrecognizable, and trick the spirits.
Now according to www.weddingceremonyideas.info The Bride & Groom not Seeing Each Other Before the Ceremony. Comes to us from Jewish tradition. It was customary for the couple not to see each other for one week before the wedding, then right before the ceremony, they would meet and the groom would put the veil over the brides face symbolizing modesty, and that his love was more then just physical appearance.
Different genere's meant different meanings for wedding veils. In Medieval the times it was worn to show purity in the bride. Today, the veil is still seen as quite a formal wedding accessory. The Royals have made the veil to be very sophisticated and something of class and as the times went on it was more and more a custom to see veils incorporated in "normal" people's weddings.