operation Meaning and Definition

1. n. the activity of operating something (a machine or business etc.)

2. n. a planned activity involving many people performing various actions

3. n. a process or series of acts especially of a practical or mechanical nature involved in a particular form of work

4. n. a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body

5. n. (mathematics) calculation by mathematical methods

6. n. activity by a military or naval force (as a maneuver or campaign)

7. n. a business especially one run on a large scale

8. n. (psychology) the performance of some composite cognitive activity; an operation that affects mental contents

9. n. (computer science) data processing in which the result is completely specified by a rule (especially the processing that results from a single instruction)

10. n. process or manner of functioning or operating

11. n. the state of being in effect or being operative