Impermeable meaning

ĭm-pûr'mē-ə-bəl
Not allowing passage, especially of liquids; waterproof.
adjective
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Impossible to permeate.
adjective
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The definition of impermeable is not able to be broken through, or not allowing fluids to pass through.

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

adjective
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Impossible to permeate.

An impermeable membrane; an impermeable border.

adjective
3
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Not permeable; not permitting fluids to pass through it; impenetrable.
adjective
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Relating to a material through which substances, such as liquids or gases, cannot pass. Some substances, such as some types of contact lenses, are permeable to gas but impermeable to liquid.
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Origin of impermeable

From French imperméable, from Latin impermeābilis, from im- + permeābilis (“permeable”).