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  Definition of operation
  1. the activity of operating something (a machine or business etc.); "her smooth operation of the vehicle gave us a surprisingly comfortable ride"
  2. a planned activity involving many people performing various actions; "they organized a rescue operation"; "the biggest police operation in French history"; "running a restaurant is quite an operation"; "consolidate the companies various operations"
  3. a process or series of acts especially of a practical or mechanical nature involved in a particular form of work; "the operations in building a house"; "certain machine tool operations"
  4. a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body; "they will schedule the operation as soon as an operating room is available"; "he died while undergoing surgery"
  5. (mathematics) calculation by mathematical methods; "the problems at the end of the chapter demonstrated the mathematical processes involved in the derivation"; "they were learning the basic operations of arithmetic"
  6. activity by a military or naval force (as a maneuver or campaign); "it was a joint operation of the navy and air force"
  7. a business especially one run on a large scale; "a large-scale farming operation"; "a multinational operation"; "they paid taxes on every stage of the operation"; "they had to consolidate their operations"
  8. (psychology) the performance of some composite cognitive activity; an operation that affects mental contents; "the process of thinking"; "the cognitive operation of remembering"
  9. (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"
  10. process or manner of functioning or operating; "the power of its engine determine its operation"; "the plane''s operation in high winds"; "they compared the cooking performance of each oven"; "the jet''s performance conformed to high standards"
  11. the state of being in effect or being operative; "that rule is no longer in operation"
Similar Words: procedure, surgery, surgical operation, surgical procedure, surgical process, mathematical process, mathematical operation, military operation, process, cognitive process, mental process, cognitive operation, functioning, performance


Hyponyms: rescue operation, undercover operation, ablation, extirpation, cutting out, excision, amputation, angioplasty, arthroplasty, arthroscopy, brain surgery, castration, cautery, cauterization, cauterisation, chemosurgery, craniotomy, cryosurgery, curettage, curettement, debridement, decortication, dilation and curettage, dilatation and curettage, D and C, electrosurgery, enterostomy, enterotomy, enucleation, wrong-site surgery, evisceration, exenteration, fenestration, gastrectomy, gastroenterostomy, gastrostomy, heart surgery, hemorrhoidectomy, haemorrhoidectomy, hysterotomy, implantation, iridectomy, iridotomy, intestinal bypass, jejunostomy, major surgery, microsurgery, minor surgery, myotomy, myringectomy, myringoplasty, myringotomy, neurosurgery, orchiopexy, osteotomy, ostomy, palatopharyngoplasty, PPP, uvulopalatopharyngoplasty, UPPP, phlebectomy, photocoagulation, plastic surgery, reconstructive surgery, anaplasty, polypectomy, resection, rhinotomy, rhizotomy, Shirodkar's operation, purse-string operation, sterilization, sterilisation, strabotomy, taxis, tracheostomy, tracheotomy, transplant, transplantation, organ transplant, trephination, tympanoplasty, uranoplasty, vasovasostomy, vivisection, permutation, combination, differentiation, maximization, integration, exponentiation, involution, arithmetic operation, matrix operation, construction, relaxation, relaxation method, combined operation, maneuver, manoeuvre, simulated military operation, campaign, military campaign, naval campaign, mission, military mission, support, reinforcement, reenforcement, attack, onslaught, onset, onrush, offense, offence, offensive, peacekeeping, peacekeeping mission, peacekeeping operation, amphibious operation, information gathering, psychological operation, psyop, covert operation, Meuse, Meuse River, Argonne, Argonne Forest, Meuse-Argonne, Meuse-Argonne operation, Operation Desert Storm, basic cognitive process, higher cognitive process, access, memory access, asynchronous operation, auxiliary operation, off-line operation, boolean operation, binary operation, binary arithmetic operation, computer operation, machine operation, concurrent operation, control operation, control function, dyadic operation, fixed-cycle operation, logic operation, logical operation, monadic operation, unary operation, multiplex operation, parallel operation, simultaneous operation, printing operation, search, lookup, serial operation, sequential operation, consecutive operation, sort, sorting, synchronous operation, threshold operation, commission, running


Derivational Morphology: operate, run, engage, mesh, lock, control, function, work, go, operate on, manoeuver, maneuver, manoeuvre


Anagrams: pretorian


Language Translations:
Bulgarian: действие and операция   Chinese: 运营 and 手术  
Dutch: operatie   Finnish: leikkaus and toiminta  
French: opération   German: Betrieb and Operation  
Greek: εγχείριση and λειτουργία   Hebrew: נתוח  
Hungarian: működés and operáció   Italian: operazione  
Japanese: 手術 and 作業   Korean: 수술 and 작용  
Portuguese: operação   Russian: операция  
Spanish: operación   Swedish: operation  
Welsh: gweithrediad and llawdriniaeth  
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