generational

Adjective

1. Of, pertaining to, or changing over generations.
   • The generational shift Mr. Obama once embodied is, in fact, well under way, but it will not change Washington as quickly — or as harmoniously — as a lot of voters once hoped. - 2012 November 7, Matt Bai, “Winning a...
2. Exceptional; the best/worst of a generation; once-in-a-generation.
3. Very good/bad (through semantic bleaching or weakening of the above sense).
   • Mr Musk’s actions are worrying shareholders – a gesture he referred to as a “Roman salute” has not gone down well in Europe. In a recent survey of over 100,000 Germans, 94pc said they would never purchase a Tesla, while...