degree of accuracy; degree of certainty; confidence level
Used in technical, statistical, or formal contexts to describe how accurate or reliable something is. Often seen in phrases like 確度が高い (highly accurate/certain) or 確度を上げる (improve accuracy).
The accuracy of this prediction is still low.
データを増やして分析の確度を高める。
We increase the amount of data and improve the reliability of the analysis.
accuracy; degree of accuracy
Compound of 確 (certain, sure) and 度 (degree). The word is a relatively modern technical coinage, not found in classical Japanese.