Emily Dickinson Lexicon

PRO-VI'SO, n. [s as z. L. provisus, ablative proviso, it being provided.]

An article or clause in any statute, agreement, contract, grant or other writing, by which a condition is introduced; a conditional stipulation that affects an agreement, contract, law, grant, &c. The charter of the bank contains a proviso that the legislature may repeal it at their pleasure.