Synonyms of 'incidentally'
1 by the wayDictionary, in passing, en passantThe tower, incidentally, dates from the twelfth century.
2 accidentally, casually, by chanceIn her denunciation, she incidentally shed some light on another mystery.
The door cannot be opened accidentally.
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in passing: in chess, said of capturing a pawn that has made an initial move of two squares to its fourth rank, bypassing the square where an enemy pawn on its own fifth rank could capture it. The capture is made as if the captured pawn had moved one square instead of two
He advised her, en passant, that she should see a doctor.
Video: pronunciation of 'incidentally'
Thesaurus for incidentally from the Collins English Thesaurus
You use incidentally to introduce a point which is not directly relevant to what you are saying , often a question or extra information that you have just thought of.