math, mathematics, maths - a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement

function, mathematical function - a mathematical relation such that each element of one set is associated with at least one element of another set

linear operator - an operator that obeys the distributive law: A(f+g) = Af + Ag (where f and g are function)

identity element, identity operator, identity - an operator that leaves unchanged the element on which it operates; "the identity under numerical multiplication is 1"

causal agency, causal agent, cause - any entity that causes events to happen

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

businessman, man of affairs - a person engaged in commercial or industrial business (especially an owner or executive)

supermarketeer, supermarketer - an operator of a supermarket

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

plunger, speculator - someone who risks losses for the possibility of considerable gains