(physics) A differential operator which may be expressed as ∂_𝜇∂^𝜇=∑_(𝜇=0)³∂/∂x^𝜇∂/∂x_𝜇; it is the four-dimensional (Minkowski space) equivalent of the three-dimensional Laplace operator.

(programming, informal) The operator := that assigns values to variables in certain programming languages.

plural of suede-shoe operator

(slang) A flashy and dishonest trader.

(telecommunications) A provider of mobile telecommunications who does not operate any physical network infrastructure, but relies on contracting with physical mobile telecom network infrastructure operators to provide mobility access.

(construction) (This entry is a translation hub.)

A person who operates machinery.

A person who operates a forklift.

plural of length operator

plural of d'Alembert operator