na-adjective, noun which may take the genitive case particle 'no', adverb, noun
special; particular; extraordinary; exceptional
Broadly used for something that is not ordinary, set apart, or given distinct treatment. Functions as a な-adjective, の-adjective, adverb, or noun.
今日は特別な日です。
Today is a special day.
He was given special treatment.
特別な理由はありません。
There is no particular reason.