1. ((give; show)) conclusive evidence; positive proof; (a) confirmation ((of; that))
    • 彼の有罪の確証を握る
    • secure [obtain] conclusive evidence of his guilt
    • 彼がそれをやったという確証はない
    • There is no positive proof that he did it.
    • 彼の理論が正しいという確証を得た
    • The validity of his theory was confirmed.