1. Arranged or existing for the present, possibly to be changed later; temporary
The government established a provisional government until elections could be held.
O governo estabeleceu um governo provisório até que as eleições pudessem ser realizadas.
2. Conditional; dependent on something else happening
Her provisional acceptance of the job offer was dependent on salary negotiations.
Sua aceitação provisória da oferta de emprego dependia de negociações salariais.