1. An uncommon, rare, or unconventional way of doing something; a procedure that is not commonly used or seen
The teacher used an unusual method to teach mathematics to her students.
A professora utilizou um método inusitado para ensinar matemática aos seus alunos.
2. A novel or innovative approach to solving a problem or accomplishing a task
His research employed an unusual method that produced surprising results.
Sua pesquisa empregou um método inusitado que produziu resultados surpreendentes.