digress

In intransitive terms the difference between digress and meander

is that digress is to turn aside from the right path; to transgress; to offend while meander is to wind or turn in a course or passage; to be intricate.

As a noun meander is

a winding, crooked, or involved course.

As verbs the difference between digress and excur

is that digress is to step or turn aside; to deviate; to swerve; especially, to turn aside from the main subject of attention, or course of argument, in writing or speaking while excur is to digress.