An example of digress is when you are writing a paper about causes of crime and you start to instead write long paragraphs about defenses to crimes.
Origin of digress; from Classical Latin digressus, past participle of digredi, to go apart ; from dis-, apart + gradi, to go, step: see grade
intransitive verbdi·gressed, di·gress·ing, di·gress·es
Origin of digressLatin dīgredī, dīgress- : dī-, dis-, apart; see dis– + gradī, to go; see ghredh- in Indo-European roots.
(third-person singular simple present digresses, present participle digressing, simple past and past participle digressed)
From Latin digressum, past participle of digredi.