OPERATION — СИНОНІМІЯ
operation a process or series of acts especially of a practical or mechanical nature involved in a particular form of work
WordNet
operation a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body
operation (mathematics) calculation by mathematical methods
operation activity by a military or naval force (as a maneuver or campaign)
WordNet
operation (psychology) the performance of some composite cognitive activity; an operation that affects mental contents
operation process or manner of functioning or operating
WordNet