†(a) n. pistol-proof armour (obsolete); (b) adj. resistant to pistol fire.

proof against the sword; capable of resisting the stroke of a sword.

Able to withstand fire or great heat; incombustible. Also figurative.

invulnerable to plots or conspiracies.

figurative.

That cannot be injured by a sword or other pointed weapon. Also in figurative context.

protected or impenetrable by or as by armour.

†(a) secure from damage by water, waterproof (obsolete); (b) free from or devoid of water.

exempt from, or proof against, being stung.

†(a) invulnerable to iron weapons (obsolete rare); (b) containing no iron.

Strong enough to resist bombs or shells. Also transferred and figurative.

impervious to penetration or damage by projectiles from firearms (cf. bullet-proof adj. at bullet, n.1 compounds 1b).

secure against bears; esp. (of a rubbish bin, food container, etc.) effective in preventing bears from gaining access to food or food waste.

secure against dingoes; esp. (of fencing, netting, etc.) effective in preventing dingoes from gaining access to an area.

Resistant to the destructive effects of earthquakes.

Proof against being tampered with; not susceptible to misuse. Esp. of mechanism.

Esp. of living cells or tissue: resistant to the action of ionizing radiation.

resistant to being tampered with; (esp. of packaging) designed to make improper interference difficult or impossible. See also tamperproof, adj.