Get the FREE one-click dictionary software for Windows
or the iPhone/iPad and Android apps
Adjective: digressive  dI'gre-siv or di'gre-siv
  1. (of e.g. speech and writing) tending to depart from the main point or cover a wide range of subjects
    "amusingly digressive with satirical thrusts at women's fashions among other things";
    - discursive, excursive, rambling
     
  2. Of superficial relevance if any
    "a digressive allusion to the day of the week";
    - tangential

See also: beside the point, indirect, irrelevant