incidentally
1. [ adverb ] introducing a different topic
Synonyms: by_the_way by_the_bye
Examples:

"by the way, I won't go to the party"

2. [ adverb ] in an incidental manner
Synonyms: by_chance accidentally
Examples:

"these magnificent achievements were only incidentally influenced by Oriental models"

Related terms: incidental incidental
3. [ adverb ] by the way
Synonyms: apropos
Examples:

"apropos, can you lend me some money for the weekend?"

Similar spelling:   incidental
  incidental_to
  incidence
  incitement
  incidence_angle
  inside_track