Open English Wordnet
Adjectives
(s)digressive, discursive, excursive, rambling(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”