incidentally

1. (manner) In an incidental manner; not of central or critical importance.Examples: "The book discussed the subject, but only incidentally."; "Nor, will the tragic dramatist who would depict mortal indomitableness in its fullest sweep and direct swing, ever forget a hint, incidentally so important in his art, as the one now alluded to."; "Not everybody welcomes standardisation as a principle, because it reduces variety (and, incidentally, tends to dispose of the quainter and more picturesque anomalies)."

2. (speech act, conjunctive) Parenthetically, by the way.Examples: "Incidentally, did you hear anything new from your brother yesterday?"Synonyms: apropos, as a matter of fact, by the wayconjunctive