Synonym: cognitive operation, cognitive process, functioning, mathematical operation, mathematical process, mental process, military operation, performance, procedure, process, surgery, surgical operation, surgical procedure, surgical process. Similar words: AND operation, generation gap, consideration, operating, cooperative, migration, reparation, separation. Meaning: [‚ɑpə'reɪʃn /‚ɒp-] 
n. 1. a business especially one run on a large scale 2. a planned activity involving many people performing various actions 3. a process or series of acts especially of a practical or mechanical nature involved in a particular form of work 4. the state of being in effect or being operative 5. a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body 6. activity by a military or naval force (as a maneuver or campaign) 7. (computer science) data processing in which the result is completely specified by a rule (especially the processing that results from a single instruction) 8. process or manner of functioning or operating 9. (mathematics) calculation by mathematical methods 10. (psychology) the performance of some composite cognitive activity; an operation that affects mental contents 11. the activity of operating something (a machine or business etc.).
n. 1. a business especially one run on a large scale 2. a planned activity involving many people performing various actions 3. a process or series of acts especially of a practical or mechanical nature involved in a particular form of work 4. the state of being in effect or being operative 5. a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body 6. activity by a military or naval force (as a maneuver or campaign) 7. (computer science) data processing in which the result is completely specified by a rule (especially the processing that results from a single instruction) 8. process or manner of functioning or operating 9. (mathematics) calculation by mathematical methods 10. (psychology) the performance of some composite cognitive activity; an operation that affects mental contents 11. the activity of operating something (a machine or business etc.). 
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31. Doctors performed an emergency operation for appendicitis last night.
32. In desperation, Mrs. Jones submitted to an operation on her right knee to relieve the pain.
33. He insisted on describing his operation in graphic detail while we were eating lunch.
34. I had the operation on the recommendation of my doctor.
35. He had an operation last year to widen a heart artery.
36. The operation will go ahead as soon as a suitable donor can be found.
37. This is a very minor operation and there is very little risk involved.
38. The operation on the new born infant was a failure.
39. After your operation, you'll need to convalesce for a week or two.
40. My father has made a full recovery from the operation.
41. Greenpeace has been invited to appraise the environmental costs of such an operation.
42. The prognosis after the operation was for a full recovery.
43. Each department in the company has its own mode of operation and none of them are compatible.
44. I turned away in revulsion when they showed a close-up of the operation.
45. She spent a month in the country recuperating from/after the operation.
46. He needed an operation to close a nasty gash in his arm.
47. The young nurse was very nervous when she assisted at her first operation.
48. They were also given the opportunity to do some operation.
49. An operation is beginning to try to save a species of crocodile from extinction.
50. After the operation you may find it difficult to chew and swallow.
51. The documentary went through all the graphic details of the operation in unsparing detail.
52. An operation of this magnitude is going to be difficult.
53. Their baby had an operation to repair a cleft palate.
54. The operation will have to be done under anaesthetic .
55. Sally had been recovering well from her operation,[sentencedict.com] but yesterday she experienced/suffered a setback.
56. She spent the night in intensive care after the operation.
57. The security of the whole operation has been jeopardized by one careless person.
58. The next phase of the operation will involve the deployment of more than 35,000 troops from a dozen countries.
59. She underwent an operation on a tumour in her left lung last year.
60. I was on crutches for three months after the operation.
More similar words: AND operation, generation gap, consideration, operating, cooperative, migration, reparation, separation, frustration, exploration, immigration, celebration, integration, corporation, demonstration, concentration, collaboration, administration, operate, operator, cooperate, cooperate with, ratio, nation, interaction, relation, formation, equation, national, education.