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 digressfrom 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.