To gratify the need, desire, or expectation of. To fulfill (a need or desire). To free from doubt or question; assure. To get rid of (a doubt or question); dispel. To discharge (a debt or obligation, for example) in full. To discharge an obligation to (a creditor). To conform to the requirements of (a standard or rule); be sufficient to (an end). To make reparation for; redress. Mathematics To make the left and right sides of an equation equal after substituting equivalent quantities for the unknown variables in the equation. To be sufficient or adequate. To give satisfaction.