nostalgia

 
Pronunciation: /nɒˈstaldʒə/

noun

[mass noun]
  • a sentimental longing or wistful affection for a period in the past: I was overcome with acute nostalgia for my days at university
  • something done or presented in order to evoke feelings of nostalgia: an evening of TV nostalgia

Derivatives

nostalgist

noun

Origin:

late 18th century (in the sense 'acute homesickness'): modern Latin (translating German Heimweh 'homesickness'), from Greek nostos 'return home' + algos 'pain'