operation

The definition of an operation is the process of working or functioning, or a surgical procedure.

(noun)

See operation in Webster's New World College Dictionary

noun

the act, process, or method of operating
the condition of being in action or at work
a process or action that is part of a series in some work
1. any movement or series of movements made in carrying out strategic military plans
2. a center where such activities are monitored or supervised, as at an air base
3. any specific plan, project, venture, etc.: Operation Cleanup
any surgical procedure performed, usually with the aid of instruments, to remedy a physical ailment or defect
Math. any process, as addition, division, etc., involving a change or transformation in a quantity

Origin: ME operacion < OFr < L operatio

See operation in American Heritage Dictionary 4

noun

The act or process of operating or functioning.
The state of being operative or functional: a factory in operation.
A process or series of acts involved in a particular form of work: the operation of building a house.
An instance or method of efficient, productive activity: That restaurant is quite an operation.
An unethical or illegal business: a fencing operation for stolen goods.
Medicine A surgical procedure for remedying an injury, ailment, defect, or dysfunction.
Mathematics 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.
Computer Science An action resulting from a single instruction.
a. A military or naval action, campaign, or mission.
b. operations The headquarters or center from which a military action, flights into and out of an airfield, or other activities are controlled.
operations The division of an organization that carries out the major planning and operating functions.