Reference meaning
impregnable
Last updated
immune to attack; incapable of being tampered with
Related source terms
Other meanings
2. adjective
capable of conceiving
3. adjective
incapable of being overcome, challenged or refuted
Source and scope
This definition is reproduced from Princeton WordNet 3.0, sense 02526125-s, under the WordNet 3.0 License. It has not yet received VocabularyBase editorial review. Read the source and license details.