1. a sentimental longing or wistful affection for the past, typically for a period or place with happy personal associations: "I was overcome with acute nostalgia for my days in college"
▪ something done or presented in order to evoke feelings of nostalgia:"an evening of TV nostalgia"
Word Originmid 18th century (in the sense ‘acute homesickness’): modern Latin (translating German Heimweh ‘homesickness’), from Greek nostos ‘return home’ + algos ‘pain’.