(firearms) A charge of powder and ball, greater than the service charge, fired in an arm, as a gun or cannon, to test its strength.

(printing) A page of proofed text; a sheet used to make corrections, emendations etc. before being printed for use. / (photography) A contact print.

plural of burden of proof

(US) Used other than figuratively or idiomatically: 55% alcohol by volume. / (idiomatic) Stronger than strong.

Intensely; strongly.

(law, of a defendant) Exempt from the payment of debts, either because of insufficient funds or because of protection by statute.

airtight

plural of conditional proof

plural of devil's proof

plural of ontological proof