impermeable

The definition of impermeable is not able to be broken through, or not allowing fluids to pass through.

(adjective)

An example of something impermeable is a zip-closure plastic bag.

See impermeable in Webster's New World College Dictionary

adjective

not permeable; not permitting fluids to pass through it; impenetrable

Origin: LL impermeabilis

Related Forms:

See impermeable in American Heritage Dictionary 4

adjective

Impossible to permeate: an impermeable membrane; an impermeable border.

Related Forms:

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