補ほ間かん法ほうほかんほうMeanings1nouninterpolation methodmathematicsMathematical term for estimating unknown values between known data points. Often contrasted with 補外法 (extrapolation).See also: 補外法補ほ間かん法ほうを使つかって、欠かけているデータを推すい定ていした。We estimated the missing data using an interpolation method.