Foolproof Definition

fo͝olpro͝of
fool-proof
adjective
So simple, well-designed, or sturdily made as not to be mishandled, damaged, misunderstood, etc. even by a fool.
Webster's New World
Designed so as to be impervious to human incompetence, error, or misuse.
A foolproof detonator; a foolproof safety lock.
American Heritage
Effective; infallible.
A foolproof scheme.
American Heritage

Origin of Foolproof

  • fool +‎ -proof

    From Wiktionary

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