Synonyms for nostalgia at Thesaurus with free online thesaurus, antonyms, and definitions. Find descriptive alternatives for nostalgia, Nostalgia | Definition of Nostalgia by Merriam-Webster, Nostalgia (or sometimes called "Nostalgic") is a sentimentality for the past, typically for a period or place with happy personal associations. The word nostalgia is learned formation of a Greek compound, consisting of νόστος (nóstos), meaning "homecoming", a Homeric word, and ἄλγος (álgos), meaning "pain" or "ache", and was. Nostalgia - Wikipedia. A bittersweet longing for things, persons, or situations of the past. The condition of being homesick; homesickness, Think of the noun nostalgia when you long for the good old days of the past..