Okay kiddo, I'll do my best to explain what an engageante is. Ever seen a dress that has really pretty lace or frills around the sleeves? That's called an engageante. It's an extra bit of fabric that goes on the sleeves of a fancy dress or outfit.
Engageantes were really popular a long time ago, when people dressed up a lot more for fancy events. They were especially popular during the Victorian era, when ladies wore really long dresses with big skirts and tight corsets.
The engageante gave an extra bit of flare to the dress, making it even fancier and more elegant. It was like an accessory for the dress, like how a necklace or earrings can make an outfit look even better.
So, that's what an engageante is: a fancy bit of fabric that goes on the sleeves of a dress or outfit to make it look super fancy.