1. having the strength to withstand attack (Freq. 1) • Syn: impregnability • Derivationally related forms: impregnable (for: impregnability) • Hypernyms: safety 2. the property of being invulnerable; the property of being incapable of being hurt (physically or emotionally) • Ant: vulnerability • Derivationally related forms: invulnerable • Hypernyms: strength • Hyponyms: immunity