practitioner

noun
C1+
OPAL
1
C1+
a person who works in a profession, especially medicine or law
کارور, حرفه‌ورز, پزشک, وکیل
see also family practitioner, general practitioner, nurse practitioner
2
a person who regularly does a particular activity, especially one that requires skill
متخصص, کاردان, فرد حرفه‌ای, اهل فن
one of the greatest practitioners of science fiction