Meaning of "specialize" in Essential American English Dictionary

specialize

verb us /ˈspeʃ·əˌlɑɪz/ (present participle specializing, past tense and past participle specialized)

to spend most of your time studying one subject or doing one type of business:

She works for a company specializing in business law.

(Definition of “specialize” from the Webster's Essential Mini Dictionary © Cambridge University Press)