1. (noun)parenthesis either of two punctuation marks (or) used to enclose textual material Synonyms: digression, excursus, aside, divagation
2. (noun)digression, aside, excursus, divagation, parenthesis a message that departs from the main subject Synonyms: deflection, excursion, excursus, digression, divagation, deflexion, parenthesis, aside, diversion, deviation