“We sat through a rambling lecture about how Mr. Warren decided to build a violin from scratch.”
“He grew almost apoplectic with impatience at my laborious attempts to keep up with his rambling kaleidoscope of people, places, precepts and prejudices.”
“His perplexed colleagues strained to understand his rambling speech.”
rambly
Tending to ramble, to wander aimlessly or to make meandering digressions.