What is "digresses"

Usage examples of "digresses".

He digresses from an account of the ascent of Vesuvius to compare the prices of gloves, linen shirts, and dress suits in Paris and in Italy.

When he digresses, and imagines tender souls, he exaggerates their sensibility, in order to render their oppression more odious.

Although the book takes place during only three days, it is as much an autobiography as anything else, because Holden constantly digresses to tell us about things that happened long before this period in his life.