(now uncommon) A longing for home or familiar surroundings; homesickness. / (transferred sense) A bittersweet yearning for the things of the past.

plural of nostalgia

Nostalgia for the former Socialist Federal Republic of Yugoslavia.

(slang) A nostalgic perspective (which obscures the reality of something); to be blinded by nostalgia.

(rare) Nostalgia for past trends or media.

To believe experiences and objects in popular culture (often TV shows, video games etc) from one's past outweigh modern counterparts in terms of quality.

A nostalgic person.

plural of nostalgiac