Nostalgia is the sadness he feels to be far the homeland or beloved somewhere. It is also the sadness that someone remembers times or people from the past that you feel emotionally linked. Melancholy is a State of nostalgic and gentle sadness. In psychiatry is a State of intense depression, lived with a sense of moral pain. It is characterized by inhibition of the psychomotor functions and the death wish.
NOSTALGIA: 1: melancholic sadness caused by the memory of a lost-2 that: punishment of being absent homeland or the relatives or friends. MELANCHOLY: 1: sadness wanders, deep, peaceful and permanent, born of moral or physical causes, making sure if you have it not taste or fun nothing.-2: Monomania in which dominate the moral conditions sad.-3: disused, black bile or atrabilis.