A short and/or incomplete realization of a certain method or idea to demonstrate its feasibility. / (software engineering, perhaps nonstandard) A proof of technology or pilot project.

Alternative spelling of future-proof

Alternative spelling of future-proof

(colloquial) Nearly impossible to sell to others.

(law) The duty of a party in a legal proceeding to prove an assertion of fact; it includes both the burden of production and the burden of persuasion; the onus probandi.

(law) Of a person whom a judgment cannot be enforced against.

A person who reads proof, copy or other text, looking for errors and making corrections

Alternative spelling of bulletproof (Capable of withstanding a direct shot, reliable, or unbreakable).

Designed and constructed to withstand or minimize damage from an internal or external explosion.

(logic) The indirect verification or falsification of a statement by the verification or falsification of each of the finite number of cases which arise therefrom.