Easton's Bible Dictionary (1897)
An adviser (Prov. 11:14; 15:22), a king’s state counsellor (2 Sam. 15:12). Used once of the Messiah (Isa. 9:6). In Mark 15:43, Luke 23:50, the word probably means a member of the Jewish Sanhedrim.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
COUN'SELLOR. Luke 23:50.