Servant of God (Latin: Servus Dei) is a title used in the Catholic Church to indicate that an individual is on the first step toward possible canonization as a saint.
Paul calls himself "a servant of God" in Titus 1:1 (δοῦλος Θεοῦ, doulos Theou), while James calls himself "a servant of God and the Lord Jesus Christ" (θεοῦ καὶ κυρίου Ἰησοῦ χριστοῦ δοῦλος, Theou kai Kyriou Iēsou Christou doulos) in James 1:1.
Following usage conventions established in the King James Bible, the word "servant" is never capitalized or used as a title of nobility.
The next step is being declared venerable, upon a decree of heroism or martyrdom by the honored.
Hence, any of the faithful can be named a Servant of God in a larger frame of meaning.