- as a subordinate or chance occurrence
- (sentence modifier) by the way
WordReference Random House Learner's Dictionary of American English © 2026
in•ci•den•tal•ly /ˌɪnsɪˈdɛntəli -ˈdɛntli/USA pronunciation
adv.
WordReference Random House Unabridged Dictionary of American English © 2026- apart or aside from the main subject;
by the way:Incidentally, if you want to see her again, let me know.
in•ci•den•tal•ly
(in′si den′tl ē or, for 1, -dent′lē),USA pronunciation adv.
- apart or aside from the main subject of attention, discussion, etc.;
by the way;
parenthetically. - in an incidental manner.
- incidental + -ly 1655–65
Collins Concise English Dictionary © HarperCollins Publishers::
incidentally /ˌɪnsɪˈdɛntəlɪ/ adv
'incidentally' also found in these entries (note: many are not synonyms or translations):