Definitions

1. verb

to devote one’s time and efforts to acquiring specialist knowledge or skills in a particular subject

“She specialised in marketing and landed a job at a top advertising agency.”

2. verb

to concentrate on or become an expert in a particular activity or subject

“He specialised in playing the guitar and soon became a professional musician.”

3. noun

a person who has specialist knowledge or skills in a particular subject

“The company hired several specialists to work on the project.”

4. noun

a particular branch of a subject

“She studied international law and criminology as her two areas of specialisation.”