Meaning of OPERATOR in English

noun a dealer in stocks or any commodity for speculative purposes; a speculator.

2. operator ·noun one who, or that which, operates or produces an effect.

3. operator ·noun the symbol that expresses the operation to be performed;

— called also facient.

4. operator ·noun one who performs some act upon the human body by means of the hand, or with instruments.

Webster English vocab.      Английский словарь Webster.