- a detailed discussion of some point in a book, especially one added as an appendix.
- a digression or incidental excursion, as in a narrative.
Origin of excursus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for excursus
This is not to say, of course, that the excursus in the second stage has been a loss and a defect.Pagan & Christian Creeds
Let us not at this moment go into an excursus to inquire who he was and who he was not.Christmas Eve and Christmas Day
Edward E. Hale
In an excursus we shall deal with the language of the Picts.
On the relations between Edessa and Rome see the end of the Excursus.History of Dogma, Volume 2 (of 7)
That would involve an excursus on Irish topography, which would be, to say the least, out of place.
- an incidental digression from the main topic under discussion or from the main story in a narrative
C19: from Latin: a running forth, from excurrere to run out
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012