divagatory
/dɪvæɡˈætɔri/Definitions
1. adjective
Tending to wander or deviate from the subject, often in a manner that is rambling or discursive.
“The professor’s divagatory speech left the students confused about the main topic.”
2. noun
A person who is prone to wandering or deviating from the subject in conversation.
“The divagatory friend dominated the conversation with unrelated stories.”