The state of being in effect or being operative.

Roget 170: agency, operation, force, working, strain, function, office, maintenance, exercise, work, swing, play; interworking^†, interaction; procurement.    causation etc. 153; instrumentality etc. 631; influence etc. 175; action etc. (voluntary) 680; modus operandi etc. 627.    quickening power, maintaining power, sustaining power; home stroke.    ... show more

Dutch: werking

A business especially one run on a large scale.

A planned activity involving many people performing various actions.

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

Activity by a military or naval force (as a maneuver or campaign):
— It was a joint operation of the navy and air force.

synonym: military operation.

Dutch: operatie
Polish: operacja, działania

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.

synonyms: surgery, surgical operation, surgical procedure, surgical process.

Roget 662: remedy, help, cure, redress; medicine, medicament; diagnosis, medical examination; medical treatment; surgery; preventive medicine.    [medical devices] clinical thermometer, stethoscope, X-ray machine.    anthelmintic [Med.]; antidote, antifebrile [Med.], antipoison^†, counterpoison^†, antitoxin, antispasmodic; bracer, faith cure, placebo; helminthagogue^†, lithagogue^†, pick-meup, stimulant, tonic; vermifuge, prophylactic, corrective, restorative; sedative etc. 174; palliative; febrifuge; alterant^†, alterative; specific; antiseptic, emetic, analgesic, pain-killer, antitussive [Med.], antiinflammatory [Med.], antibiotic, antiviral [Med.], antifungal [Med.], carminative; Nepenthe, Mithridate.    cure, treatment, regimen; radical cure, perfect cure, certain cure; sovereign remedy.    examination, diagnosis, diagnostics; analysis, urinalysis, biopsy, radiology.    medicine, physic, Galenicals^†, simples, drug, pharmaceutical, prescription, potion, draught, dose, pill, bolus, injection, infusion, drip, suppository, electuary^†; linctus^†, lincture^†; medicament; pharmacon^†.    nostrum, receipt, recipe, prescription; catholicon^†, panacea, elixir, elixir vitae, philosopher's stone; balm, balsam, cordial, theriac^†, ptisan^†.    agueweed^†, arnica, benzoin, bitartrate of potash, boneset^†, calomel, catnip, cinchona, cream of tartar, Epsom salts [Chem]; feverroot^†, feverwort; friar's balsam, Indian sage; ipecac, ipecacuanha; jonquil, mercurous chloride, Peruvian bark; quinine, quinquina^†; sassafras, yarrow.    salve, ointment, cerate, oil, lenitive, lotion, cosmetic; plaster; epithem^†, embrocation^†, liniment, cataplasm^†, sinapism^†, arquebusade^†, traumatic, vulnerary, pepastic^†, poultice, collyrium^†, depilatory; emplastrum^†; eyewater^†, vesicant, vesicatory [Med.].    compress, pledget^†; bandage etc. (support) 215.    treatment, medical treatment, regimen; dietary, dietetics; vis medicatrix^†, vis medicatrix naturae [Lat.]; medecine expectante [Fr.]; bloodletting, bleeding, venesection [Med.], phlebotomy, cupping, sanguisae, leeches; operation, surgical operation; transfusion, infusion, intravenous infusion, catheter, feeding tube; prevention, preventative medicine, immunization, inoculation, vaccination, vaccine, shot, booster, gamma globulin.    pharmacy, pharmacology, pharmaceutics; pharmacopoeia, formulary; acology^†, Materia Medica [Lat.], therapeutics, posology^†; homeopathy, allopathy^†, heteropathy [Med.], osteopathy, hydropathy [Med.]; cold water cure; dietetics; surgery, chirurgery [Med.], chirurgy^†; healing art, leechcraft^†; orthopedics, orthopedy^†, orthopraxy^†; pediatrics; dentistry, midwifery, obstetrics, gynecology; tocology^†; sarcology^†.    hospital, infirmary; pesthouse^†, lazarhouse^†; lazaretto; lock hospital; maison de sante [Fr.]; ambulance.    dispensary; dispensatory^†, drug store, pharmacy, apothecary, druggist, chemist.    Hotel des Invalides; sanatorium, spa, pump room, well; hospice; Red Cross.    doctor, physician, surgeon; medical practitioner, general practitioner, specialist; medical attendant, apothecary, druggist; leech; osteopath, osteopathist^†; optometrist, ophthalmologist; internist, oncologist, gastroenterologist; epidemiologist [Med.], public health specialist; dermatologist; podiatrist; witch doctor, shaman, faith healer, quack, exorcist; Aesculapius^†, Hippocrates, Galen; accoucheur [Fr.], accoucheuse [Fr.], midwife, oculist, aurist^†; operator; nurse, registered nurse, practical nurse, monthly nurse, sister; nurse's aide, candystriper; dresser; bonesetter; pharmaceutist^†, pharmacist, druggist, chemist, pharmacopolist^†.    ... show more

Dutch: chirurgie, spreekkamer, heelkunde, operatiekamer, operatie
Polish: operacja

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.

synonym: procedure.

Roget 680: action, performance; doing, etc. v.; perpetration; exercise, excitation; movement, operation, evolution, work; labor etc. (exertion) 686; praxis, execution; procedure etc. (conduct) 692; handicraft; business etc. 625; agency etc. (power at work) 170.    deed, act, overt act, stitch, touch, gest transaction^†, job, doings, dealings, proceeding, measure, step, maneuver, bout, passage, move, stroke, blow; coup, coup de main, coup d'etat [Fr.]; tour de force etc. (display) 882; feat, exploit; achievement etc. (completion) 729; handiwork, workmanship; manufacture; stroke of policy etc. (plan) 626.    actor etc. (doer) 690.    ... show more

Dutch: bediening

Process or manner of functioning or operating:
— The power of its engine determines its operation.
— The plane's operation in high winds.

synonyms: functioning, performance.

Dutch: bedrijf, werking
Polish: osiąg

psychology The performance of some composite cognitive activity; an operation that affects mental contents:
— The cognitive operation of remembering.

synonyms: cognitive operation, cognitive process, mental process, process.

Polish: proces psychiczny

mathematics Calculation by mathematical methods:
— They were learning the basic operations of arithmetic.

synonyms: mathematical operation, mathematical process.

Polish: działanie matematyczne, operacja, działanie

The activity of operating something (a machine or business etc.).