wander

The act or instance of wandering.

“to go for a wander in the park”

The situation where a value or signal etc. deviates from the correct or normal value.

“baseline wander in ECG signals”

To move without purpose or specified destination; often in search of livelihood.

“to wander over the fields”

To stray; stray from one's course; err.

“A writer wanders from his subject.”

To commit adultery.

To go somewhere indirectly or at varying speeds; to move in a curved path.

Of the mind, to lose focus or clarity of argument or attention.