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Noun operation has 11 senses
  1. operation - a business especially one run on a large scale; "a large-scale farming operation"; "a multinational operation"; "they paid taxes on every stage of the operation"; "they had to consolidate their operations"
    --1 is a kind of
    business activity, commercial activity
    Derived form: verb operate1
  2. operation - a planned activity involving many people performing various actions; "they organized a rescue operation"; "the biggest police operation in French history"; "running a restaurant is quite an operation"; "consolidate the companies various operations"
    --2 is a kind of
    --2 has particulars: rescue operation; undercover operation
  3. operation, procedure - a process or series of acts especially of a practical or mechanical nature involved in a particular form of work; "the operations in building a house"; "certain machine tool operations"
    --3 is a kind of work
    Derived form: verb operate2
  4. operation - the state of being in effect or being operative; "that rule is no longer in operation"
    --4 is a kind of
    action, activity, activeness
    --4 has particulars: commission; running
    Derived form: verb operate6
  5. operation, surgery, surgical operation, surgical procedure, surgical process - a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body; "they will schedule the operation as soon as an operating room is available"; "he died while undergoing surgery"
    --5 is a kind of medical procedure
    --5 has parts:
     hemostasis, haemostasis, hemostasia, haemostasia; incision, section, surgical incision; suturing
    --5 has particulars:
     ablation, extirpation, cutting out, excision; amputation; angioplasty; arthroplasty; arthroscopy; brain surgery; castration; cautery, cauterization, cauterisation; chemosurgery; craniotomy; cryosurgery; curettage, curettement; debridement; decortication; dilation and curettage, dilatation and curettage, D and C; electrosurgery; enterostomy, enterotomy; enucleation; wrong-site surgery; evisceration; exenteration; fenestration; gastrectomy; gastroenterostomy; gastrostomy; heart surgery; hemorrhoidectomy, haemorrhoidectomy; hysterotomy; implantation; iridectomy; iridotomy; intestinal bypass; jejunostomy; major surgery; microsurgery; minor surgery; myotomy; myringectomy; myringoplasty; myringotomy; neurosurgery; orchiopexy; osteotomy; ostomy; palatopharyngoplasty, PPP, uvulopalatopharyngoplasty, UPPP; phlebectomy; photocoagulation; plastic surgery, reconstructive surgery, anaplasty; polypectomy; resection; rhinotomy; rhizotomy; sex-change operation, transsexual surgery; Shirodkar's operation, purse-string operation; sterilization, sterilisation; strabotomy; taxis; tracheostomy, tracheotomy; transplant, transplantation, organ transplant; trephination; tympanoplasty; uranoplasty; vasovasostomy; vivisection
    Derived form: verb operate7
  6. operation, military operation - activity by a military or naval force (as a maneuver or campaign); "it was a joint operation of the navy and air force"
    --6 is a kind of activity
    --6 has particulars:
     combined operation; maneuver, manoeuvre, simulated military operation; campaign, military campaign; naval campaign; mission, military mission; support, reinforcement, reenforcement; attack, onslaught, onset, onrush; offense, offence, offensive; peacekeeping, peacekeeping mission, peacekeeping operation; amphibious operation; information gathering; psychological operation, psyop; covert operation; Meuse, Meuse River, Argonne, Argonne Forest, Meuse-Argonne, Meuse-Argonne operation; Operation Desert Storm
    Derived form: verb operate4
  7. operation - (computer science) data processing in which the result is completely specified by a rule (especially the processing that results from a single instruction); "it can perform millions of operations per second"
    --7 is a kind of
    data processing
    --7 has particulars:
     access, memory access; asynchronous operation; auxiliary operation, off-line operation; boolean operation, binary operation, binary arithmetic operation; computer operation, machine operation; concurrent operation; control operation, control function; dyadic operation; fixed-cycle operation; logic operation, logical operation; monadic operation, unary operation; multiplex operation; parallel operation, simultaneous operation; printing operation; search, lookup; serial operation, sequential operation, consecutive operation; sort, sorting; synchronous operation; threshold operation
  8. operation, functioning, performance - process or manner of functioning or operating; "the power of its engine determine its operation"; "the plane's operation in high winds"; "they compared the cooking performance of each oven"; "the jet's performance conformed to high standards"
    --8 is a kind of process
    Derived form: verb operate2
  9. mathematical process, mathematical operation, operation - (mathematics) calculation by mathematical methods; "the problems at the end of the chapter demonstrated the mathematical processes involved in the derivation"; "they were learning the basic operations of arithmetic"
    --9 is a kind of calculation, computation, computing
    --9 has particulars:
     permutation; combination; differentiation; maximization; integration; exponentiation, involution; arithmetic operation; matrix operation; construction; relaxation, relaxation method
  10. process, cognitive process, mental process, operation, cognitive operation - (psychology) the performance of some composite cognitive activity; an operation that affects mental contents; "the process of thinking"; "the cognitive operation of remembering"
    --10 is a kind of cognition, knowledge, noesis
    --10 has particulars: basic cognitive process; higher cognitive process
    Derived form: verb operate5
  11. operation - the activity of operating something (a machine or business etc.); "her smooth operation of the vehicle gave us a surprisingly comfortable ride"
    --11 is a kind of
    Derived forms: verb operate1, verb operate6, verb operate3
operating procedure operating room operating statement operating surgeon operating system operating table operating theater operating theatre operation operation code operation cycology operation desert storm operation s operation surgeon operational operational casualty operational cell

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