"Nostalgia" is best defined as:

• "Nostalgia" is best defined as: Longing for the past.

• Nostalgia (Noun)
- Bangla Meaning: গৃহকাতরতা; অতীতবিধুরতা।
- English Meaning: a wistful or excessively sentimental yearning for return to or of some past period or irrecoverable condition.The state of being homesick: homesickness.

Example Sentence:

- He was filled with a nostalgic longing for the past.
- I began to feel nostalgic as we talked about our school days.
- We made a nostalgic trip to the hotel where we honeymooned.

Source: Merriam-Webster Dictionary, Accessible Dictionary.