MeSH

Work consisting of speeches read or delivered before an audience or class, especially for instruction or to set forth some subject. They are differentiated from an ADDRESS which are less didactic and more informational, entertaining, inspirational, or polemic. (From Random House Unabridged Dictionary, 2d ed)

Year introduced: 2019(1997)

Work consisting of notes taken at the delivery or reading of a speech before an audience or class, usually given to instruct. (From Random House Unabridged Dictionary, 2d ed)

Year introduced: 2008(1997)

Work consisting of speeches, orations, or written statements, usually formal, directed to a particular group of persons. These are different from a LECTURE that is usually delivered to classes for instructional purposes.

Year introduced: 2019(1997)