An Etymological Dictionary of Astronomy and Astrophysics

1. General: A guess or estimate; nearness in space, position, degree.
   

2. Math., Physics: Result that is not quite exact, but is within the limits of accuracy required for a given purpose.

Etymology (EN): Approximation, verbal noun of → approximate.

Etymology (PE): Nazdineš, verbal noun of nazdinidan,
→ approximate.