Although, it's not a cloak--a cloak is, as I have discovered, a cape, but long. A cloak doesn't have arms. Vogue 9340 has arms; the pattern envelope calls it a coat, but that doesn't feel right. Neither does 'robe,' because, when someone sews a robe, the connotation is usually going to be "item to be worn around the house"
Not that I'm sure when I might wear this, but it will be 'out of the house'