Definitions for: Excursus

[n] a message that departs from the main subject

Webster (1913) Definition: Ex*cur"sus, n. [L., fr. excurrere, excursum. See
Excurrent.]
A dissertation or digression appended to a work, and
containing a more extended exposition of some important point
or topic.

Synonyms: aside, digression, divagation, parenthesis

See Also: content, message, subject matter, substance