digressive in WordNet English dictionary

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"; "a rambling discursive book"; "his excursive remarks"; "a rambling speech about this and that"
   digressive  discursive  excursive  rambling 
   
2. of superficial relevance if any
   "a digressive allusion to the day of the week"; "a tangential remark"
   digressive  tangential