mention/note something in passingSAYif you say something in passing, you mention it while you are mainly talking about something else 〔在谈论别的事情时〕顺便说起某事，附带提及某事 He did mention his brother’s wife, but only in passing. 他确实提到了他的弟媳，但只是顺带而已。
mention/note something in passing• He noted, in passing, that he had lasted longer than Texas Sen.• Like many more, presumably, we mention Ribblehead in passing.• In Exodus the quails were mentioned only in passing.
→ mention/note something in passing at passing1(2)