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Definition of Impregnable
1. Adjective. Immune to attack; incapable of being tampered with. "A secure telephone connection"
Exact synonyms: Inviolable, Secure, Strong, Unassailable, Unattackable
Similar to: Invulnerable
Derivative terms: Impregnability, Secureness
Similar to: Invulnerable
Derivative terms: Impregnability, Secureness
2. Adjective. Capable of conceiving.
3. Adjective. Incapable of being overcome, challenged or refuted. "Impregnable self-confidence"
Definition of Impregnable
1. a. Not to be stormed, or taken by assault; incapable of being subdued; able to resist attack; unconquerable; as, an impregnable fortress; impregnable virtue.
2. a. Capable of being impregnated, as the egg of an animal, or the ovule of a plant.
Definition of Impregnable
1. [adj]
Medical Definition of Impregnable
1.