|1.||[ adverb ] introducing a different topic|
"by the way, I won't go to the party"
|2.||[ adverb ] in an incidental manner|
"these magnificent achievements were only incidentally influenced by Oriental models"
|Related terms:||incidental incidental|
|3.||[ adverb ] by the way|
"apropos, can you lend me some money for the weekend?"