Originally, enchantment; magic charm; especially, the effect of a spell that causes one to see objects in a form that differs from reality, typically to make filthy, ugly, or repulsive things seems beauteous.
"The witch's glamour transformed the rotting corpse into a vision of perfect beauty before her eyes faded away."
In plain English: Glamour is an attractive and exciting quality that makes someone seem magical or special, even if they aren't actually perfect.
"The movie gave her an instant glamour that turned heads everywhere she went."
Usage: Use glamour as an informal synonym for attractiveness or allure rather than its original meaning of magical illusion. It is often confused with glamor when spelled without an 'u', but both are acceptable variants in modern English.
To enchant; to bewitch.
"The dancer's movements had a glamour that left the audience breathless."
The word glamour entered English from Scots as a term for magic. Its origin is likely connected to Old Norse words meaning "the moon" or an illusion caused by pale sight.