(theology) From the work worked; referring to sacraments deriving their power from Christ's work rather than the role of humans, and thus not requiring faith to be effective.

(algebra, computing) A symbol representing unary operation; an operator taking one operand.

(algebra, computing) A symbol representing binary operation; an operator taking two operands.

One who operates. / A telecommunications facilitator whose job is to establish temporary network connections.

plural of operator

(mathematics, physics) A differential operator,denoted ∆ and defined on ℝⁿ as 𝛥=∑ᵢ₌₁ⁿ(∂²)/(∂x_i²), used in the modeling of wave propagation, heat flow and many other applications.

A person who operates a telephone switchboard. / A person who provides assistance in establishing a connection, or who provides information or takes messages via the telephone.

A company that sells package holidays.

A subcontractor who may be a commercial carrier, but most often provides capacity (trucks and drivers, with or without trailers or chassis) to either commercial or private carriers under a contract for services.

Alternative spelling of short circuit operator