n. 1 evidence, verification, corroboration, confirmation, validation, authentication, ratification, substantiation; documentation, document, facts, data, certification, testimony, Colloq ammunition Is there any proof that she was with you? The prosecution claims to have enough proof of his guilt to convict him of embezzlement 2 test, trial, measure, standard, touchstone, criterion Do you intend to put his loyalty to the proof? The proof of the pudding is in the eating
adj. 3 impervious, impenetrable, able to withstand or resist, protective, strong, tough, impregnable, resistant, tempered They maintain that this armour is proof against a nine-inch shell