Definition of Operation

1. Noun. The state of being in effect or being operative. "That rule is no longer in operation"

Generic synonyms: Action, Activeness, Activity
Specialized synonyms: Commission, Running, Idle
Derivative terms: Operate

2. Noun. A business especially one run on a large scale. "They had to consolidate their operations"
Generic synonyms: Business Activity, Commercial Activity
Derivative terms: Operate

3. Noun. A planned activity involving many people performing various actions. "Consolidate the companies various operations"
Generic synonyms: Activity
Specialized synonyms: Rescue Operation, Undercover Operation

4. Noun. (computer science) data processing in which the result is completely specified by a rule (especially the processing that results from a single instruction). "It can perform millions of operations per second"

5. Noun. Activity by a military or naval force (as a maneuver or campaign). "It was a joint operation of the navy and air force"

6. Noun. A medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body. "He died while undergoing surgery"
Exact synonyms: Surgery, Surgical Operation, Surgical Procedure, Surgical Process
Specialized synonyms: Catheterisation, Catheterization, Ablation, Cutting Out, Excision, Extirpation, Amputation, Angioplasty, Arthroplasty, Arthroscopy, Brain Surgery, Castration, Cauterisation, Cauterization, Cautery, Chemosurgery, Craniotomy, Cryosurgery, Curettage, Curettement, Debridement, Decortication, D And C, Dilatation And Curettage, Dilation And Curettage, Electrosurgery, Enterostomy, Enterotomy, Enucleation, Wrong-site Surgery, Evisceration, Exenteration, Eye Operation, Eye Surgery, Fenestration, Gastrectomy, Gastroenterostomy, Gastrostomy, Heart Surgery, Haemorrhoidectomy, Hemorrhoidectomy, Hysterotomy, Implantation, Intestinal Bypass, Jejunostomy, Major Surgery, Microsurgery, Minor Surgery, Myotomy, Myringectomy, Myringoplasty, Myringotomy, Neurosurgery, Orchiopexy, Osteotomy, Ostomy, Palatopharyngoplasty, Ppp, Uppp, Uvulopalatopharyngoplasty, Phlebectomy, Photocoagulation, Anaplasty, Plastic Surgery, Reconstructive Surgery, Polypectomy, Resection, Rhinotomy, Rhizotomy, Sex-change Operation, Transsexual Surgery, Purse-string Operation, Shirodkar's Operation, Sterilisation, Sterilization, Strabotomy, Taxis, Tracheostomy, Tracheotomy, Organ Transplant, Transplant, Transplantation, Trephination, Tympanoplasty, Uranoplasty, Vasovasostomy, Vivisection
Terms within: Haemostasia, Haemostasis, Hemostasia, Hemostasis, Incision, Section, Surgical Incision, Suturing
Generic synonyms: Medical Procedure
Category relationships: Surgery
Examples of category: Freeze, Suction, Decorticate, Ablate, Hypophysectomise, Hypophysectomize, Trepan
Derivative terms: Operate, Operative, Surgical

7. Noun. A process or series of acts especially of a practical or mechanical nature involved in a particular form of work. "Certain machine tool operations"
Exact synonyms: Procedure
Generic synonyms: Work
Derivative terms: Operate, Procedural

8. Noun. Process or manner of functioning or operating. "The jet's performance conformed to high standards"
Exact synonyms: Functioning, Performance
Generic synonyms: Physical Process, Process
Derivative terms: Function, Operate

9. Noun. (psychology) the performance of some composite cognitive activity; an operation that affects mental contents. "The cognitive operation of remembering"
Exact synonyms: Cognitive Operation, Cognitive Process, Mental Process, Process
Generic synonyms: Cognition, Knowledge, Noesis
Specialized synonyms: Basic Cognitive Process, Higher Cognitive Process
Category relationships: Psychological Science, Psychology
Derivative terms: Operate

10. Noun. (mathematics) calculation by mathematical methods. "They were learning the basic operations of arithmetic"

11. Noun. The activity of operating something (a machine or business etc.). "Her smooth operation of the vehicle gave us a surprisingly comfortable ride"
Generic synonyms: Activity
Category relationships: Business, Business Enterprise, Commercial Enterprise
Derivative terms: Operate, Operate, Operate

Definition of Operation

1. n. The act or process of operating; agency; the exertion of power, physical, mechanical, or moral.

Definition of Operation

1. Noun. The method by which a device performs its function. ¹

2. Noun. The method or practice by which actions are done. ¹

3. Noun. A planned undertaking. ¹

4. Noun. A business or organization. ¹

5. Noun. (medicine) a surgical procedure. ¹

6. Noun. (mathematics) a procedure for generating a value from one or more other values (the operands; the value for any particular operands is unique) ¹

7. Noun. (military) a military campaign (''w:Operation Desert Storm'') ¹

¹ Source:

Definition of Operation

1. [n -S]

Medical Definition of Operation

1. 1. The act or process of operating; agency; the exertion of power, physical, mechanical, or moral. "The pain and sickness caused by manna are the effects of its operation on the stomach." (Locke) "Speculative painting, without the assistance of manual operation, can never attain to perfection." (Dryden) 2. The method of working; mode of action. 3. That which is operated or accomplished; an effect brought about in accordance with a definite plan; as, military or naval operations." 4. Effect produced; influence. "The bards . . . Had great operation on the vulgar." (Fuller) 5. Something to be done; some transformation to be made upon quantities, the transformation being indicated either by rules or symbols. 6. Any methodical action of the hand, or of the hand with instruments, on the human body, to produce a curative or remedial effect, as in amputation, etc. Calculus of operations. See Calculus. Origin: L. Operatio: cf. F. Operation. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Operation

operating procedure
operating room
operating room information systems
operating room nursing
operating room technicians
operating rooms
operating statement
operating surgeon
operating system
operating systems
operating table
operating theater
operating theatre
operating theatres
operating time
operation (current term)
operation code
operation of law
operational casualty
operational cell
operational damage
operational definition
operational research
operational service period
operational service periods
operational taxonomic unit

Literary usage of Operation

Below you will find example usage of this term as found in modern and/or classical literature:

1. The American Journal of Psychology by Granville Stanley Hall, Edward Bradford Titchener (1892)
"He finds in literature 24 cases where insanity followed operation, ... In analyzing these cases he finds that the rôle of the operation may be a variable ..."

2. Proceedings by Philadelphia County Medical Society (1902)
"operation, ischiorectal sinus incised and packed; vaginal incision and drainage. ... operation, vaginal incision enlarged and drainage. Recovered. ..."

3. Library Journal by Richard Rogers Bowker, Charles Ammi Cutter, American Library Association, Library Association (1899)
"There are four practical methods by which co-operation may come In to ameliorate ... By co-operation in cataloging is meant the employment of some method by ..."

4. Capital: A Critique of Political Economy by Karl Marx (1906)
"Simple co-operation is always the prevailing form, in those branches of ... Co-operation ever constitutes the fundamental form of the capitalist mode of ..."

5. Elements of the Integral Calculus: With a Key to the Solution of Dfferential by William Elwood Byerly, Benjamin Osgood Peirce (1895)
"From this point of view the symbol is called a symbol of operation, and the expression written after the symbol is called the subject of the operation. ..."

6. The Lancet (1898)
"I think, too, that if the surgeon can have the choice he should undertake the operation in fine, warm weather so that the child can the sooner be taben out ..."

7. A Treatise on Orthopedic Surgery by Royal Whitman (1903)
"The deaths due directly to the operation were 21 (16.45 per cent. ... Laminectomy is an incomplete operation in the sense that the disease of the bone is ..."

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