bulletproof

bul-let-proof · adjective

imported

Definitions

adjective

  1. 1.

    Designed to resist the penetration of bullets.

  2. 2.

    [informal]Impossible to damage, disprove, or fail; completely secure.

  3. 3.

    To make resistant to failure or criticism.

Phrases & expressions

  • •
    bulletproof vest — A protective garment worn to stop bullets.
  • •
    bulletproof coffee — A type of coffee blended with fats, popular in certain diets.

Related words

Antonyms: unprotected, vulnerable
See also: armor, protection, shield
Synonyms: armored, impenetrable, invulnerable

Etymology

Compound of "bullet" + "proof," meaning protected against bullets. First used in the early 20th century with the development of protective materials.