Meaning of nonpermeable | Babel Free

Definitions

1. Synonym of impermeable.
   not-comparable
2. Having the same magnetic permeability as that of free space, so that the material in question has a magnetic permeability μ=μ₀ (where μ₀ = 4π×10⁻⁷ N A⁻² exactly in SI units).
   not-comparable

CEFR level