1. A source, cause, or beginning that cannot be precisely identified, established, or determined
The disease is of indeterminate origin, making treatment difficult.
A doença é de origem indeterminada, dificultando o tratamento.
2. Unknown or unclear ancestry or starting point
The artifact's indeterminate origin puzzled archaeologists for years.
A origem indeterminada do artefato desconcertou arqueólogos por anos.