Op"er*a`tor (?), n. [L.]
1. One who, or that which, operates or produces an effect.
2. (Surg.) One who performs some act upon the
human body by means of the
hand, or with instruments.
3.
A dealer in stocks or any
commodity for speculative purposes; a speculator. [Brokers' Cant]
4. (Math.) The symbol that expresses the operation to be performed; -- called also facient.
Hear it pronounced