A long meandering talk with no specific topic or direction.
"His rambling story about a lost dog eventually turned into an hour-long discussion about cloud formations and his childhood in Nebraska."
present participle of ramble
"The old man spent hours telling us a long, rambling story about his childhood adventures in the countryside."
spreading out in different directions or distributed irregularly
"sprawling handwriting"
"straggling branches"
"straggly hair"
(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"
of a path e.g.
"meandering streams"
"rambling forest paths"
"the river followed its wandering course"
"a winding country road"
Of a speech: meandering, long and digressing.
"The professor's rambling lecture on quantum physics went on for an hour without ever returning to the main point."