operation

The act or process of operating or functioning.

The state of being operative or functional.

A process or series of acts involved in a particular form of work.

An instance or method of efficient, productive activity.

An unethical or illegal business.

A surgical procedure for remedying an injury, ailment, defect, or dysfunction.

A process or action, such as addition, substitution, transposition, or differentiation, performed in a specified sequence and in accordance with specific rules.

A logical operation.

An action resulting from a single instruction.