1. reverberation; swelling (of a hymn); trailing note
鐘の余韻が静かに響いていた。The lingering sound of the bell was quietly echoing.
2. lingering memory; aftertaste
とはいえ、まだ余韻もあるんだろう。That said, the afterglow is probably still lingering.
3. suggestiveness (of a book, poem, etc.)