Obs. [Short for concio ad clerum, discourse to the clergy.] A Latin sermon, preached on certain occasions at the English Universities.
1655. Fuller, Hist. of Camb. Univ., 90, marg. (D.). This I heard in a Clerum from Dr. Collings. Ibid., 151. On Saturday following, immediately after the Clerum, he should go up into the Pulpit of S. Maryes.
[1802. Camb. Univ. Cal., 41. The Lady Margarets Preachers are now required, by their office, to preach a Latin Sermon, or Concio ad Clerum, before the University the day preceding each Term.]
¶ Also as vb. To address the clergy or scholars.
1619. J. Dyke, Caveat Archippus, 23. Our language is now growne so learned, that a man may Clerum in English.