WordWeb Online

1. A message that departs from the main subject
   - aside, excursus, divagation, parenthesis
    
2. A turning aside (of your course, attention or concern)
   "a digression into irrelevant details";
   - diversion, deviation, deflection, deflexion [Brit], divagation
    
3. Wandering from the main path of a journey
   - excursion

Derived forms: digressions

Type of: content, journey, journeying, message, subject matter, substance, turn, turning

Encyclopedia: Digression