HyperDic: by_the_bye

English > 1 sense of the expression *by the bye*:
ADVERB	all	by the bye, by the way, incidentally, apropos	introducing a different topic

English > *by the bye*: 1 sense > adverb 1
Meaning	introducing a different topic; in point of fact.
Synonyms	by the way, incidentally, apropos
Spanish	a propósito, de paso, por cierto
Catalan	a propòsit, per cert