Easton's Bible Dictionary (1897)
A foster-child, an Ephesian who accompanied Paul during a part of his third missionary journey (Acts 20:4; 21:29). He was with Paul in Jerusalem, and the Jews, supposing that the apostle had brought him with him into the temple, raised a tumult which resulted in Paul’s imprisonment. ) In writing to Timothy, the apostle says, “Trophimus have I left at Miletum sick” (2 Tim. 4:20). This must refer to some event not noticed in the Acts.
Smith's Bible Dictionary (1863)
(nutritious). Both Trophimus and Tychicus accompanied Paul from Macedonia as far as Asia, but Tychicus seems to have remained there, while Trophimus proceeded with the apostle to Jerusalem. ) There he was the innocent cause of the tumult in which St. Paul was apprehended. (Acts 21:27-29) From this passage we learn two new facts, viz. that Trophimus was a Gentile, and that he was a native of Trophimus was probably one brethren who, with Titus, conveyed the second Epistle to the Corinthians.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
TROPH'IMUS (foster-child), a native of Ephesus, Acts 21:29, and a convert to the faith of the gospel, probably under Paul's ministry. Acts 20:4. He became one of the apostle's companions and helpers in missionary travels and labors. 2 Tim 4:20.
Hitchcock's Bible Names (1869)
well educated; well brought up