1. a method, custom, or habit that is uncommon, rare, or not typical of normal behavior
It is an unusual practice to work on weekends in this company.
É uma prática inusitada trabalhar nos fins de semana nesta empresa.
2. a non-standard or unconventional way of doing something
The chef's unusual practice of cooking with liquid nitrogen impressed the diners.
A prática inusitada do chef de cozinhar com nitrogênio líquido impressionou os clientes.