An air of compelling charm, romance, and excitement, especially when delusively alluring.
Archaic A magic spell; enchantment.
[Scots, magic spell, alteration of grammar (from the association of learning with magic).]
Usage Note: Many words, such as honor, vapor, and labor, are usually spelled with an -or ending in American English but with an -our ending in British English. The preferred spelling of glamour, however, is -our, making it an exception to the usual American practice. The adjective is more often spelled glamorous in both American and British usage.
[glam-er] 
ər