1. In a manner that does not follow established customs, rules, or accepted norms
She dressed unconventionally for the formal event.
Ela se vestiu de forma não convencional para o evento formal.
2. In an unusual or unorthodox way; contrary to what is standard or expected
He approached the problem unconventionally and found a unique solution.
Ele abordou o problema de forma não convencional e encontrou uma solução única.