spe·cial 
(spĕshəl)
(spĕshəl)adj.
1. Surpassing what is common or usual; exceptional: a special occasion; a special treat.
2.
a. Distinct among others of a kind: a special type of paint; a special medication for arthritis.
b. Primary: His special satisfaction comes from volunteer work.
3. Peculiar to a specific person or thing; particular: my own special chair; the special features of a computer.
4.
a. Having a limited or specific function, application, or scope: a special role in the mission.
b. Arranged for a particular occasion or purpose: a special visit from her daughter.
5. Regarded with particular affection and admiration: a special friend.
6. Additional; extra: a special holiday flight.
n.
1. Something arranged, issued, or appropriated to a particular service or occasion: rode to work on the commuter special.
2. A featured attraction, such as a reduced price: a special on salmon.
3. A single television production that features a specific work, a given topic, or a particular performer.
[Middle English, from Old French especial, from Latin speciālis, from speciēs, kind; see SPECIES.]
special·ly adv.
special·ness n.