Main entry: excursion, digression
Definition: wandering from the main path of a journey
Main entry: divagation, diversion, deviation, digression, deflection, deflexion
Definition: a turning aside (of your course or attention or concern)
Usage: a diversion from the main highway; a digression into irrelevant details; a deflection from his goal
Main entry: digression, divagation, parenthesis, aside, excursus
Definition: a message that departs from the main subject