tediously prolonged or tending to speak or write at great length
Editing a prolix manuscript. A prolix lecturer telling you more than you want to know.
source: WordNet 3.0
Extending to a great length; unnecessarily long; minute in narration or argument; excessively particular in detail; -- rarely used except with reference to discourse written or spoken; as, a prolix oration; a prolix poem; a prolix sermon.
