1. The state of being uncertain; lack of certainty or confidence about something
There are many uncertainties in the financial market.
Há muitas incertezas no mercado financeiro.
2. Things that are not known, established, or fixed
The uncertainties of life require us to be flexible.
As incertezas da vida nos exigem ser flexíveis.
3. In science and mathematics, the degree of doubt or variation in a measurement or value
The measurement has an uncertainty of plus or minus 5 percent.
A medição tem uma incerteza de mais ou menos 5 por cento.