Digression

n.	1.	The act of digressing or deviating, esp. from the main subject of a discourse; hence, a part of a discourse deviating from its main design or subject. The digressions I can not excuse otherwise, than by the confidence that no man will read them. - Sir W. Temple.
	2.	A turning aside from the right path; transgression; offense. Then my digression is so vile, so base, That it will live engraven in my face. - Shak.
	3.	(Anat.) The elongation, or angular distance from the sun; - said chiefly of the inferior planets.

Noun	1.	digression - a message that departs from the main subject Synonyms: divagation, excursus, parenthesis, aside
	2.	digression - a turning aside (of your course or attention or concern); "a diversion from the main highway"; "a digression into irrelevant details"; "a deflection from his goal" Synonyms: divagation, diversion, deflexion, deviation, deflection
	3.	digression - wandering from the main path of a journey Synonyms: excursion

aberrancy, aberration, ambages, apostrophe, aside, bend, bias, branching off, bypass, bypath, byway, circling, circuit, circuition, circuitousness, circuitry, circularity, circulation, circumambience, circumambiency, circumambulation, circumbendibus, circumflexion, circumlocution, circummigration, circumnavigation, corner, crook, crosswiseness, curve, declination, deflection, deflexure, departure, detour, deviance, deviancy, deviating, deviation, deviousness, diagonality, digressing, discursion, divagation, divarication, divergence, diversion, dogleg, double, drift, drifting, episode, errantry, excurse, excursion, excursus, exorbitation, gyre, gyring, hairpin, incident, indirection, indirectness, meandering, nonconformity, obiter dictum, obliqueness, obliquity, orbit, orbiting, parenthesis, pererration, rambling, roundabout, roundabout way, roundaboutness, rounding, sheer, shift, shifting, shifting course, shifting path, side path, side road, sidetrack, skew, skewness, slant, spiral, spiraling, squint, straying, sweep, swerve, swerving, swinging, tack, transverseness, turn, turning, twist, vagary, variation, veer, wandering, warp, wheeling, yaw, zigzag