OPERATOR

Definitions

1. 1. One who, or that which, operates or produces an effect.
2. 2. One who performs some act upon the human body by means of the hand, or with instruments.
3. 3. A dealer in stocks or any commodity for speculative purposes; a speculator. [Brokers' Cant]
4. 4. The symbol that expresses the operation to be performed; -- called also facient.