1A pursuit, area of study, or skill to which someone has devoted much time and effort and in which they are expert.

1. 1.1 A particular branch of medicine or surgery.
2. 1.2 A product, especially a type of food, that a person or region is famous for making well.
   the local specialties are all seafood
3. 1.3as modifier Meeting particular tastes or needs.
   specialty potatoes for salads

2Law
A contract under seal.