Definitions for impregnable

Definitions for (adj) impregnable

Main entry: inexpugnable, impregnable

Definition: incapable of being overcome, challenged or refuted

Usage: an impregnable argument; impregnable self-confidence

Main entry: conceptive, impregnable

Definition: capable of conceiving

Main entry: inviolable, impregnable, unassailable, unattackable, strong, secure

Definition: immune to attack; incapable of being tampered with

Usage: an impregnable fortress; fortifications that made the frontier inviolable; a secure telephone connection

Visual thesaurus for impregnable