incidentally

[in-si-den-tl-ee or for 1, -dent-lee]

adverb

apart or aside from the main subject of attention, discussion, etc.; by the way; parenthetically.
in an incidental manner.

Origin of incidentally

First recorded in 1655–65; incidental + -ly
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


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British Dictionary definitions for incidentally

incidentally

adverb

as a subordinate or chance occurrence
(sentence modifier) by the way
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for incidentally
adv.

1520s, "by the way, casually;" see incidental + -ly (2). Sense of "as a new but related point" attested by 1925.

Online Etymology Dictionary, © 2010 Douglas Harper