(1.) The Authorized Version rendering in (Isaiah 3:3) for what is literally "skillful in whisper or incantation."
(2.) The title applied to Tertullus, who appeared as the advocate of the Jewish accusers of St. Paul before Felix, (Acts 24:1)
Orator
A man named Apollos arrives in Ephesus, and the first thing said of him is that he was “an eloquent man, and mighty in the scriptures.” He taught diligently, though he knew “only the baptism of John.” Priscilla and Aquila heard him speak in the synagogue and “expounded unto him the way of God more perfectly.” He then crossed to Achaia, where he “helped them much which had believed through grace.” Here is a gifted speaker who was still willing to be taught, and who used his skill to show from the Scriptures that Jesus was the Christ. The whole account is five verses, Acts 18:24-28.
5 verses
Acts
Acts 18:24
And a certain Jew named Apollos, born at Alexandria, an eloquent man, and mighty in the scriptures, came to Ephesus.
Acts 18:25
This man was instructed in the way of the Lord; and being fervent in the spirit, he spake and taught diligently the things of the Lord, knowing only the baptism of John.
Acts 18:26
And he began to speak boldly in the synagogue: whom when Aquila and Priscilla had heard, they took him unto them, and expounded unto him the way of God more perfectly.
Acts 18:27
And when he was disposed to pass into Achaia, the brethren wrote, exhorting the disciples to receive him: who, when he was come, helped them much which had believed through grace:
Acts 18:28
For he mightily convinced the Jews, and that publickly, shewing by the scriptures that Jesus was Christ.
From Smith's Bible Dictionary
William Smith, 1884