| operator | | |
| n. (linkdef) | 1. operator | (mathematics) a symbol or function representing a mathematical operation. |
| ~ math, mathematics, maths | a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement. |
| ~ function, mapping, mathematical function, single-valued function, map | (mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function). |
| ~ linear operator | an operator that obeys the distributive law: A(f+g) = Af + Ag (where f and g are functions). |
| ~ identity element, identity operator, identity | an operator that leaves unchanged the element on which it operates.; "the identity under numerical multiplication is 1" |
| n. (person) | 2. manipulator, operator | an agent that operates some apparatus or machine.; "the operator of the switchboard" |
| ~ causal agency, causal agent, cause | any entity that produces an effect or is responsible for events or results. |
| ~ company operator | an operator who works for a company. |
| ~ driver | the operator of a motor vehicle. |
| ~ elevator operator | an operator of an elevator. |
| ~ engine driver, locomotive engineer, railroad engineer, engineer | the operator of a railway locomotive. |
| ~ hoister | an operator of a hoist. |
| ~ jockey | an operator of some vehicle or machine or apparatus.; "he's a truck jockey"; "a computer jockey"; "a disc jockey" |
| ~ motorman | the operator of streetcar. |
| ~ radio operator | someone who operates a radio transmitter. |
| ~ switchman | a man who operates railroad switches. |
| ~ telegraph operator, telegrapher, telegraphist | someone who transmits messages by telegraph. |
| ~ switchboard operator, telephone operator, telephonist | someone who helps callers get the person they are calling. |
| n. (person) | 3. operator | someone who owns or operates a business.; "who is the operator of this franchise?" |
| ~ businessman, man of affairs | a person engaged in commercial or industrial business (especially an owner or executive). |
| ~ supermarketeer, supermarketer | an operator of a supermarket. |
| n. (person) | 4. hustler, operator, wheeler dealer | a shrewd or unscrupulous person who knows how to circumvent difficulties. |
| ~ colloquialism | a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech. |
| ~ opportunist, self-seeker | a person who places expediency above principle. |
| ~ wire-puller | one who uses secret influence (i.e. pulls wires or strings) for his own ends. |
| n. (person) | 5. operator | a speculator who trades aggressively on stock or commodity markets. |
| ~ plunger, speculator | someone who risks losses for the possibility of considerable gains. |
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