The difference between Apropos and By the way
When used as adverbs, apropos means by the way, whereas by the way means irrelevantly, off-topic.
Apropos is also preposition with the meaning: regarding or concerning.
Apropos is also adjective with the meaning: of an appropriate or pertinent nature.
By the way is also phrase with the meaning: incidentally.
check bellow for the other definitions of Apropos and By the way
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Apropos as an adjective:
Of an appropriate or pertinent nature.
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Apropos as an adjective:
by the way, incidental.
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Apropos as a preposition:
Regarding or concerning.
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Apropos as an adverb:
By the way.
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Apropos as an adverb:
Timely; at a good time.
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Apropos as an adverb:
To the purpose; appropriately.
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By the way as an adverb (UK, idiomatic):
Irrelevantly, off-topic.