blue hour ghosts [/'blu:/ /'aʊə/ /'gəʊsts/] (abbr. bhg), collective noun (m.): the thoughts, the rage, the doubts and regrets invading the time of the day of utmost intimacy; synonyms (6-fold) handful of unquiet souls, waking up at twilight to craft sounds of smooth, lingering melancholy and elegant aggression.