Question

definition of sublimation

Answer 1

the process in which solid directly convert to gaseous state is known as sublimation

Answer 2

sublimation
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it is the process by which the substances are converted into gaseous phase from solid phase directly without undergoing the liquid phase  is called sublimation

example --- camphor , naphthalene balls etc 

if keep these in open space after few days they will be found missing , but they have sublimated