'Incidentally' definitions:

Definition of 'incidentally'

From: WordNet
adverb
Introducing a different topic; in point of fact; "incidentally, I won't go to the party" [syn: by the way, by the bye, incidentally, apropos]
adverb
Of a minor or subordinate nature; "these magnificent achievements were only incidentally influenced by Oriental models" [syn: incidentally, accidentally]

Definition of 'Incidentally'

From: GCIDE
  • Incidental \In`ci*den"tal\, a. Happening, as an occasional event, without regularity; coming without design; casual; accidental; hence, not of prime concern; subordinate; collateral; as, an incidental conversation; an incidental occurrence; incidental expenses. [1913 Webster]
  • By some, religious duties . . . appear to be regarded . . . as an incidental business. --Rogers.
  • Syn: Accidental; casual; fortuitous; contingent; chance; collateral. See Accidental. -- {In`ci*den"tal*ly}, adv. -- {In`ci*den"tal*ness}, n. [1913 Webster]
  • I treat either or incidentally of colors. --Boyle. [1913 Webster]

Synonyms of 'incidentally'

From: Moby Thesaurus