Boyd’s Bible Dictionary:

(crown). Chief of the first seven deacons, and first Christian martyr. A Greek convert of strong faith and great eloquence. Arrested and tried before the Sanhedrim, but stoned to death by an angry mob, before he had time to finish his defense. The date of his martyrdom is fixed at about A. D. 37. It was followed by the conversion of Saul, who was present at the stoning, and a bitter persecutor of early Christians at the time (Acts 6:5-15; Acts 7; Acts 8:1-3).

Concise Bible Dictionary:

One of the seven chosen in the church at Jerusalem to minister the alms of the saints. He was a Greek-speaking Jew, who, though appointed to an office, yet in the energy of the Holy Ghost bore witness of the power consequent on Christ being glorified, and the Holy Spirit here (1 Tim. 3:13). Stephen was able to speak with such wisdom and power that his hearers could not withstand him. They suborned evil men to falsely accuse him, and he was dragged before the Jewish council, to whom his face appeared like that of an angel. He sketched the history of the people from Abraham, with which they were all familiar; but he laid bare from the outset the opposition of the Jews and of their fathers. Joseph they had refused; Moses they had repelled; they had turned to idolatry; had slain the prophets; had always resisted the Holy Ghost; and had been the betrayers and murderers of the Just One. Such was man’s history under culture and probation.
His hearers were cut to the heart, but did not repent: they gnashed their teeth at him. He, lifting up his eyes to heaven, saw the glory of God, and Jesus standing on the right hand of God, and bore testimony to this. But they rushed upon him, cast him out of the city, and stoned him. He, like Jesus, prayed that their sin might not be laid to their charge, and, commending his spirit to the Lord, fell asleep.
Stephen’s martyrdom formed an epoch in the history of the church. Being a Hellenist, he in this respect differed from the apostles. He was chosen for the first martyr. To him the heaven was opened, and he bore witness to Jesus, the second Man, being at the right hand of God. It is at this juncture that Saul, who was destined to carry on the ministry of the gospel of the glory of Christ, is brought into view. He was then a young man, at whose feet the witnesses laid their clothes (Acts 6:5-15; Acts 7:8:2; Acts 11:19; Acts 22:20).
It has been asserted, by some critics, that Stephen made several mistakes in his address to the council! It is said, however, in scripture that he was “full of the Holy Ghost.” See SHECHEM.

Strong’s Dictionary of Greek Words:

the same as 4735; Stephanus, a Christian
KJV Usage:

Jackson’s Dictionary of Scripture Proper Names:

a crown

Potts’ Bible Proper Names:

A crown; crowned:―chief of the first seven deacons and a Christian martyr, Acts 6:5. {Corona}