It is a title frequently given to the prophet Ezekiel, probably to remind him of his human weakness.
In the New Testament it is used forty-three times as a distinctive title of the Saviour. In the Old Testament it is used only in Psalms 80:17 and Daniel 7:13 with this application. It denotes the true humanity of our Lord. He had a true body ( Hebrews 2:14 ; Luke 24:39 ) and a rational soul. He was perfect man.
These dictionary topics are from M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition, published by Thomas Nelson, 1897. Public Domain, copy freely.
[B] indicates this entry was also found in Baker's Evangelical Dictionary Bibliography InformationEaston, Matthew George. "Entry for Son of man". "Easton's Bible Dictionary". .