1. Numbers that are close to but not exactly accurate; figures given as estimates rather than precise values
The approximate numbers suggest that around 500 people attended the event.
Os números aproximados sugerem que cerca de 500 pessoas compareceram ao evento.
2. In mathematics, values obtained through rounding or estimation rather than exact calculation
We used approximate numbers to quickly estimate the project cost.
Usamos números aproximados para estimar rapidamente o custo do projeto.