The meaning of IMPENETRABLE is incapable of being penetrated or pierced. How to use impenetrable in a sentence.

IMPENETRABLE definition: not penetrable; that cannot be penetrated, pierced, entered, etc. See examples of impenetrable used in a sentence.

IMPENETRABLE meaning: 1. impossible to see through or go through: 2. impossible to understand: 3. impossible to see…. Learn more.

1. Impossible to penetrate or enter: an impenetrable fortress. 2. Impossible to understand; incomprehensible: impenetrable jargon. 3. Impervious to sentiment or argument: an …

If you describe something such as a book or a theory as impenetrable, you are emphasizing that it is impossible or very difficult to understand.

Factsheet What does the adjective impenetrable mean? There are five meanings listed in OED's entry for the adjective impenetrable. See ‘Meaning & use’ for definitions, usage, and quotation …

IMPENETRABLE meaning: 1 : impossible to pass or see through; 2 : impossible to understand

Definition of impenetrable adjective in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Dec 14, 2025 · impenetrable (plural impenetrables) A person not openly given to friendship. (clarification of this definition is needed.) quotations

Impenetrable definition: Impossible to penetrate or enter.