Definition of operation
1 : performance of a practical work or of something involving the practical application of principles or processes Practice until you can go through the whole operation without hesitation or thinking.
2a : an exertion of power or influence the operation of a drugb : the quality or state of being functional or operative The plant is now in operation.c : a method or manner of functioning a machine of very simple operation
4 : a procedure performed on a living body usually with instruments especially for the repair of damage or defect or the restoration of health needed an operation to remove his appendix
5 : any of various mathematical or logical processes (such as addition) of deriving one entity from others according to a rule Multiplication is one mathematical operation.
6a : a usually military action, mission, or maneuver including its planning and execution military operations for a large-scale invasionb operations plural : the office on the flight line of an airfield where pilots file clearance for flights and where flying from the field is controlledc operations plural : the agency of an organization charged with carrying on the principal planning and operating functions of a headquarters and its subordinate units
7 : a business transaction especially when speculative continued his operations in cotton futures
8 : a single step performed by a computer in the execution of a program (see 1program 6b)
Examples of operation in a sentence
The family runs a small farming operation.
The company is a billion-dollar operation.
Origin and Etymology of operation
Middle English operacioun, from Middle French operation, from Latin operation-, operatio, from operari
First Known Use: 14th century
OPERATION Defined for English Language Learners
Definition of operation for English Language Learners
: a process in which a doctor cuts into someone's body in order to repair or remove a damaged or diseased part
: a usually small business or organization
: an activity of a business or organization
OPERATION Defined for Kids
Definition of operation for Students
1 : a set of actions for a particular purpose a rescue operation
2 : a medical procedure that involves cutting into a living body in order to repair or remove a damaged or diseased part I need an operation to remove my appendix.
3 : the process of putting military forces into action naval operations
4 : the state of working or being able to work The factory is now in operation.
5 : a method or manner of working The camera is designed for easy operation.
6 : a process (as addition or multiplication) of getting one mathematical expression from others according to a rule
7 : a single step performed by a computer in carrying out a program
Medical Definition of operation
: a procedure performed on a living body usually with instruments for the repair of damage or the restoration of health and especially one that involves incision, excision, or suturing
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