Definitions

1. adjective

feeling or expressing a sentimental longing or wistful affection for a period in the past, typically one’s childhood or a past era.

“Her nostalgic memories of summers spent at the beach were bittersweet.”

2. noun

a sentimental longing or wistful affection for a period in the past.

“Nostalgia is a common emotion among people who have experienced significant change.”