speciality, specialty Definition

1. Something such as a particular area of interest, a distinctive quality, a specified product, etc that a company, individual, etc has special knowledge of or that they especially excel in studying, teaching, writing about, producing, etc.

Example: the restaurant's speciality is seafood
Example: Her speciality is ancient history
Example: The restaurant's speciality is seafood
Thesaurus: forte, metier, strength, pursuit, practice.
2. A special feature, skill, characteristic, service, etc.

Speciality and specialty have virually the same meaning. Speciality is the commoner form in British English, specialty in American English.