1. A length or distance that has not been specified, determined, or limited; an indeterminate or unspecified measurement
The project has an undefined length, so we cannot estimate its completion date.
O projeto tem um comprimento indefinido, portanto não podemos estimar sua data de conclusão.
2. In programming and computing, a data structure or string that does not have a predetermined or fixed size limit
The array has an undefined length, allowing it to store any number of elements.
O array tem um comprimento indefinido, permitindo armazenar qualquer número de elementos.