a wistful desire to return in thought or in fact to a former time in one's life, to one's home or homeland, or to one's family and friends; a sentimental yearning for the happiness of a former place or time: a nostalgia for his college days.
something that elicits or displays nostalgia.
Origin of nostalgia
1770–80; < New Latin < Greeknóst(os) a return home + -algia-algia
1770, "severe homesickness" (considered as a disease), Modern Latin (cf. French nostalgie, 1802), coined 1668 by Johannes Hofer, as a rendering of German heimweh, from Greek algos "pain, grief, distress" (see -algia) + nostos "homecoming," from PIE *nes- "to return safely home" (cf. Old Norse nest "food for a journey," Sanskrit nasate "approaches, joins," German genesen "to recover," Gothic ganisan "to heal," Old English genesen "to recover"). Transferred sense (the main modern one) of "wistful yearning for the past" first recorded 1920.
