verb
1.
Synonyms: swerve 2, depart, deviate, diverge
2.
to turn aside from the main subject of attention or course of argument
he digressed into too many side issues
Synonyms: depart, divagate, diverge, excurse, ramble, stray, wander
Related Word: drift, roam
Idioms: get off the subject, go off on a tangent
Contrasted words: advance, proceed, progress