a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body | the act of approaching or entering |
(mathematics) calculation by mathematical methods | a way of entering or leaving |
activity by a military or naval force (as a maneuver or campaign) | (computer science) the operation of reading or writing stored information |
a planned activity involving many people performing various actions | the right to enter |
a process or series of acts especially of a practical or mechanical nature involved in a particular form of work | the right to obtain or make use of or take advantage of something (as services or membership) |
a business especially one run on a large scale | a code (a series of characters or digits) that must be entered in some way (typed or dialed or spoken) to get the use of something (a telephone line or a computer or a local area network etc.) |
the activity of operating something (a machine or business etc.) | |
(psychology) the performance of some composite cognitive activity; an operation that affects mental contents | |
(computer science) data processing in which the result is completely specified by a rule (especially the processing that results from a single instruction) | |
process or manner of functioning or operating | |
the state of being in effect or being operative | |