As an adverb incidentally is
(manner) in an incidental manner; not of central or critical importance.
Not English Wikidiffcom has no English definition. It may be misspelled.
(manner) In an incidental manner; not of central or critical importance.
By chance; in an unplanned way.
(speech act, conjunctive) Parenthetically, by the way.
- The book discussed the subject, but only incidentally .
- Incidentally , did you hear anything new from your brother yesterday?
apropos, as a matter of fact, by the way
* (in an incidental manner) inevitably, certainly