Glamor has its origins in the word “grammar”, and means a extraordinary quality in a particular individual, making him look like very atractive.
Glamor is a term commonly used to characterize a very elegant and charming woman, usually people from the higher social classes.
Glamor is a word of Scottish origin, as in medieval times only a few clerics knew how to read and write and they had knowledge of grammar, and for everyone else, grammar was associated with occult and mysterious practices.
At that time, the word “grammar, in English, meant "enchantment" or "spell", and in Scottish, the word was written with the letter L instead of R, which ended up becoming the term glamor known today.
Glamor is a quality of who or what is elegant, charming and considered seductive, these are things generally related to fashion, and its influence comes from the 20th century and the influence of American cinema.
There is also a collection of perfumes and creams from the O Boticário store called Glamour, which were launched to celebrate Women's Day.
See also the meaning of glamorous.