(of a device) Protected against, or designed to be proof against, misuse or error. / (of an idea or plan) Certain to succeed in all eventualities, or claimed to be so; infallible.

(transitive) To render foolproof.

present participle of foolproof

simple past tense and past participle of foolproof

Third-person singular simple present indicative form of foolproof

The state or condition of being foolproof.

(rare, nonstandard) in a foolproof manner