As a Noun:
1. A move away from the subject you are talking or writing about. English = digression, aside.
2. A route which is not the shortest way from one place to another. You often do this because you want to avoid a traffic jam, because the direct route is closed for some reason, or because you want to see the sights. English = detour.
3. A change in the course or destination of something, especially a telephone call. English = diversion.
4. Something that takes your attention away from what you are doing. English = distraction.
As a Verb or Adjective:
1. To move away from the subject you are talking or writing about and talk or write about something different for a while. English = digress. Idiomatic English = get off the point, go off the point, get sidetracked, go off the topic.
2. To make a detour.
3. To change the course or destination of something, especially a telephone call. English = divert.
4. To make someone stop concentrating on what they are doing. English = distract.
5. Of someone, to be made by something or someone else to stop concentrating on what they are doing. English = (be) distracted.