approximation

noun
OPAL
1
an estimate of a number or an amount that is almost correct, but not exact
تقریب, برآورد, تخمین, محاسبه تقریبی
2
a thing that is similar to something else, but is not exactly the same
تقریب, نزدیک‌سازی
Our results should be a good approximation of the true state of affairs.