Application - use
Sublimation - process of the change from solid to gas
Application of sublimation - the use of the process to do something, exclusively in creating things or to explain how sublimation in nature occurs.
Ice on the top of a very high icy mountain can undergo sublimation, meaning that it changes from solid phase to gas phase without going through liquid phase. This phenomenon is caused by the high pressure on the mountain top.
Naphthalene balls are one of the things that undergo sublimation. They are the white (some are colourful) balls that we place in our wardrobe to prevent vectors and molds.