nostalgia

1. (now uncommon) A longing for home or familiar surroundings; homesickness.Examples: "Seeing food at camp similar to his mother's cooking sent a wave of nostalgia through him."; "I have an idea that some men are born out of their due place. Accident has cast them amid certain surroundings, but they have always a nostalgia for a home they know not."countableuncommonuncountable

2. (transferred sense) A bittersweet yearning for the things of the past.Examples: "an alumnus' feelings of nostalgia for his/her years in high school"; "I can't have been the only person, last week, to feel a rush of nostalgia upon learning that Thames Water had removed a bus-sized, 15-tonne lump of food fat ("mixed with wet wipes") from the sewers under London. The fatberg was an August news story redolent of the old-fashioned silly season."; "[…]Rousteing asked: “Is my generation’s nostalgia for our turn-of-the-century childhood culture somehow less cool than fashion’s more familiar fixation on the 70s and 80s?” The answer was a firm “no”: in 2020 all nostalgia is good nostalgia. “The nostalgia economy”, as named by Quartz, is the most powerful trend in fashion since florals or trousers and is a reaction to what’s happening in the world."countableuncountable