<p><strong>Noun:</strong></p><ul><li>A person who operates a machine, apparatus, or the like: a telegraph operator.</li><li>A person who operates a telephone switchboard, especially for a telephone company.</li><li>A person who manages a working or industrial establishment, enterprise, or system: the operators of a mine.</li><li>A person who trades in securities, especially speculatively or on a large scale.</li><li>A person who performs a surgical operation; a surgeon.</li><li>Mathematics: a symbol for expressing a mathematical operation.</li><li>A function, especially one transforming a function, set, etc., into another: a differential operator.</li><li>Informal: a person who accomplishes goals or purposes by devious means; faker; fraud.</li><li>A person who is adroit at overcoming, avoiding, or evading difficulties, regulations, or restrictions.</li><li>A person who is extremely successful with or smoothly persuasive to potential sexual or romantic partners.</li><li>Genetics: a segment of DNA that interacts with a regulatory molecule, preventing transcription of the adjacent region.</li></ul><p><strong>End of Response</strong></p>