operator

noun

1. (mathematics) a symbol or function representing a mathematical operation

Definition categories: link, function, map, mapping

2. an agent that operates some apparatus or machine

- the operator of the switchboard

Similar word(s): manipulator

Definition categories: person, cause

3. someone who owns or operates a business

- who is the operator of this franchise?

Definition categories: person, businessman

4. a shrewd or unscrupulous person who knows how to circumvent difficulties

Similar word(s): hustler

Definition categories: person, opportunist

5. a speculator who trades aggressively on stock or commodity markets

Definition categories: person, plunger, speculator