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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151. The first 24 hours after the operation are the most critical.
152. The first stage of the operation is to join up the bones.
153. These units played a key functional role in the military operation.
154. He had an operation to reduce the swelling in his brain.
155. In this operation the surgeons implant a new lens .
156. George is taking over the running of our American operation.
157. Ensure that the grille is in place while the machinery is in operation.
158. The operation may succeed,(sentencedict.com) and it may not; it's a bit of a gamble.
159. The worst-case scenario was that he would have to have an operation.
160. It's still too soon to say whether the operation was a success.
161. It was a miracle that they were able to pull her through the operation.
162. This is just a holding operation until we get the new management structure sorted out.
162. Wish you can benefit from our online sentence dictionary and make progress day by day!
163. She had to go into hospital for her lumbar operation.
164. She accepted the prospect of her operation with equanimity .
165. The operation cannot be reversed to make her fertile again.
166. He had a hard time after the operation, but soon he was holding his own.
167. For the first time, we have the chance to examine the anatomy of a secret government operation.
168. Until the rail links are in operation, passengers can only travel through the tunnel by coach.
169. A debriefing would follow this operation, to determine where it went wrong.
170. Such a large sorting operation can take up a lot of computer time.
171. Operation Amazon is timed to coincide with the start of the dry season.
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.