The remebrance of a good time or event that makes you happy.
remembring the past.

someone who is sexy beyond mean

One of the best feelings you could ever feel. Nostalgia can take you back to a time that had a much different flow than your current lifestyle. You may be an adult right now and feel nostalgic of the days you would play outside in a little sandbox when you were 5 years old. It makes you go "Ahhh... the good old days." Or it doesn't have to be a throwback of that long. Maybe you have had work piling on your table for 3 weeks and you finally finished it. You'd think to yourself. "Wow... this is so nostalgic. I can party with my friends and have a normal sleep schedule now." Nostalgia is warm and brings a smile to your face.

A bittersweet longing for things, persons, or situations of the past.
The condition of being homesick; homesickness.

Playing Halo 3 in 2017, knowing it has been 10 years since it came out. Enough said.

A remembrance of something that was important to you, something that you loved, something you heard as a infant or a toddler, something that is unforgettable.

reminiscent of a time when the world ceased to move around you because you had it all.