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one separated from the world and consecrated to God; one holy by profession and by covenant; a believer in Christ (Ps. 16:3; Rom. 1:7; 8:27; Philippians 1:1; Hebrews 6:10)
The “saints” spoken of in Jude 1:14 are probably not the disciples of Christ, but the “innumerable company of angels” (Hebrews 12:22; Ps. 68:17), with reference to Deut. 33:2.
This word is also used of the holy dead (Matt. 27:52; Rev. 18:24).
It was not used as a distinctive title of the apostles and evangelists and of a “spiritual nobility” till the fourth century. In that sense it is not a scriptural title.