A ransom for many ( λύτρον ἀντὶ πολλῶν; from λύω. to loose, or set free). Not that Christ died only for the elect. For Christ died for all; and has obtained for all the means necessary and sufficient for their salvation.
Yet the fruit of his death and his full salvation comes only to those who persevere to the end. When our Lord says that he came "to give his life a ransom for many," he regards the vast multitude of those who are included within his purposes of mercy.
He "is the Savior of all men, specially of them that believe."