À la mode
Meaning
It means trendsetting or fashionable in French.I the USA it is a form of dessert.
Origin
It has a French origin and in 1649 it was used in John Selden’s Laws of England:
“Commanders that are never a-la-mode but when all in Iron and Steel.”
As this phrase gained popularity, it was converted in English language as a noun – alamode which means shiny black silk. In the USA its used for an ice cream and its reference is as :
“Tea and buns, apple pie à la mode and chocolate were the most serious menus.”