Meaning of nostalgia

Pls someone tell me the meaning for nostalgia ?..Is it the happiness in the history?

Hi,

You have given a good idea of the meaning. ‘Nostalgia’ is a regret at no longer having something that was in the past, which you were very fond of. You can have a feeling of nostalgia for a time in your life (in the past) when you were happy and contented.

Alan

Thank you…