special/ ˈspɛʃ əl /
adjective
of a distinct or particular kind or character:
a special kind of key.
being a particular one; particular, individual, or certain:
You’d better call the special number.
pertaining or peculiar to a particular person, thing, instance, etc.; distinctive; unique:
the special features of a plan.
having a specific or particular function, purpose, etc.:
a special messenger.
noun
a special person or thing.
a train used for a particular purpose, occasion, or the like.