1 —2 uses as in: However, complications may...Definition
though (or another expression that connects contrasting ideas)
(Based on idea 1 we might not expect idea 2, but this is a way of saying that even though idea 1 exists, we still have idea 2. Synonyms include in spite of that, , nevertheless, nonetheless, on the other hand, in contrastand but.)
The report did not, however, contain any mention of the night-vision photograph, meaning we had something the cops didn't: a timeline.
However, Harold did not have Bluetooth connectivity, or for that matter a CD player, meaning that while in Harold's company, one had three choices: 1.
There are no more uses of "however" flagged with this meaning in Turtles All the Way Down.