D defs.my
Entry 2 senses Webster, 1913

nostalgia

/nôs-tăl'-jə/ · nos·tal·gi·a · IPA /nɑˈstæld͡ʒə/
01 n. Homesickness; esp., a severe and sometimes fatal form of melancholia, due to homesickness.
  1. 1.
    Homesickness; esp., a severe and sometimes fatal form of melancholia, due to homesickness.(Med.)
  2. 2.
    A sentimental yearning to return to an earlier time remembered as happier or more pleasant, or a former place evoking happy memories; a longing to experience again a former happy time; as, a nostalgia for the brotherhood of the Woodstock music festival; a nostalgia for the comradeship of one's college friends.