[syn: diversion, deviation, digression, deflection, deflexion, divagation]
The Collaborative International Dictionary of English v.0.48:
Divagation \Di`va*ga"tion\, n. [L. divagari to wander about; di-
   = dis- + vagari to stroll about: cf. F. divagation. See
   Vagary.]
   A wandering about or going astray; digression.
   [1913 Webster]
         Let us be set down at Queen's Crawley without further
         divagation.                              --Thackeray.
   [1913 Webster]
WordNet (r) 3.0 (2006):
divagation
    n 1: a message that departs from the main subject [syn:
         digression, aside, excursus, divagation,
         parenthesis]
    2: 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" [syn:
       diversion, deviation, digression, deflection,
       deflexion, divagation]