n. 1. Work done by a cooper. [ 1913 Webster ]

2. The price paid for coopers' work. [ 1913 Webster ]

3. A place where coopers' work is done. [ 1913 Webster ]

a. [ Cf. F. coopérant. ] Operating together; as, cooperant forces. [ 1913 Webster ]

v. i. [ imp. & p. p. Cooperated; p. pr. & vb. n. Cooperating. ] [ L. cooperatus, p. p. of cooperari to cooperate; co + operari to work, opus work. See Operate. ] To act or operate jointly with another or others; to concur in action, effort, or effect. [ 1913 Webster ]

Whate'er cooperates to the common mirth. Crashaw. [ 1913 Webster ]

n. [ L. cooperatio: cf. F. coopération. ] 1. The act of cooperating, or of operating together to one end; joint operation; concurrent effort or labor. [ 1913 Webster ]

Not holpen by the cooperation of angels. Bacon. [ 1913 Webster ]

2. (Polit. Econ.) The association of a number of persons for their benefit. [ 1913 Webster ]

a. Operating jointly to the same end. [ 1913 Webster ]

Cooperative society, a society established on the principle of a joint-stock association, for the production of commodities, or their purchase and distribution for consumption, or for the borrowing and lending of capital among its members. --
Cooperative store, a store established by a cooperative society, where the members make their purchases and share in the profits or losses. [ 1913 Webster ]

n. [ L.: cf. F. coopérateur. ] One who labors jointly with others to promote the same end. “Cooperators with the truth.” Boyle. [ 1913 Webster ]

adj. 1. requiring hand manipulation for operation; not automatic or machine-driven; as, a hand-operated winch. Opposite of automatic or powered.
Syn. -- non-automatic. [ WordNet 1.5 ]

n. [ L. improperare, improperatum, to taunt. ] The act of upbraiding or taunting; a reproach; a taunt. [ Obs. ] [ 1913 Webster ]

Improperatios and terms of scurrility. Sir T. Browne [ 1913 Webster ]

n. [ L. inoperari to effect; pref. in- in + operari to operate. ] Agency; influence; production of effects. [ Obs. ] Bp. Hall. [ 1913 Webster ]

a. [ Pref. in- not + operative. ] Not operative; not active; producing no effects; as, laws renderd inoperative by neglect; inoperative remedies or processes.

n. (Computers) The quality of being interoperable. Used of data structures or executable programs. [ PJC ]

a. (Computers) Being able to function in two or more different programs or operating systems. Used of data structures or executable programs; as, Microsoft Word files are interoperable between Intel and Macintosh operating environments.. [ PJC ]

‖ety>[ L. ], manner of operating. Often abbreviated to MO [ 1913 Webster ]

n. [ It., fr. opera work, composition, opposed to an improvisation, fr. L. opera pains, work, fr. opus, operis, work, labor: cf. F. opéra. See Operate. ] 1. A drama, either tragic or comic, of which music forms an essential part; a drama wholly or mostly sung, consisting of recitative, arias, choruses, duets, trios, etc., with orchestral accompaniment, preludes, and interludes, together with appropriate costumes, scenery, and action; a lyric drama. [ 1913 Webster ]

2. The score of a musical drama, either written or in print; a play set to music. [ 1913 Webster ]

3. The house where operas are exhibited. [ 1913 Webster ]

Opera bouffe [ F. opéra opera + bouffe comic, It. buffo ],
Opera buffa [ It. ], light, farcical, burlesque opera. --
Opera box, a partially inclosed portion of the auditorium of an opera house for the use of a small private party. --
Opera comique [ F. ], comic or humorous opera. --
Opera flannel, a light flannel, highly finished. Knight. --
Opera girl or
Opera girls (Bot.), an East Indian plant (Mantisia saltatoria) of the Ginger family, sometimes seen in hothouses. It has curious flowers which have some resemblance to a ballet dancer, whence the popular name. Called also dancing girls. --
Opera glass, a short telescope with concave eye lenses of low power, usually made double, that is, with a tube and set of glasses for each eye; a lorgnette; -- so called because adapted for use at the opera, theater, etc. --
Opera hat, a gentleman's folding hat. --
Opera house, specifically, a theater devoted to the performance of operas. --
Opera seria [ It. ], serious or tragic opera; grand opera. [ 1913 Webster ]

a. Practicable. [ Obs. ] [ 1913 Webster ]

n. [ L. opus, operis, pl. opera work + -meter. ] An instrument or machine for measuring work done, especially for ascertaining the number of rotations made by a machine or wheel in manufacturing cloth; a counter. Ure. [ 1913 Webster ]

{ } n. The act of operating or working; operation. [ R. ] [ 1913 Webster ]

n. [ From neuter of L. operandus, gerundive of operari. See Operate. ] (Math.) The symbol, quantity, or thing upon which a mathematical operation is performed; -- called also faciend. [ 1913 Webster ]

a. [ L. operans, p. pr. of operari. See Operate. ] Operative. [ R. ] Shak. -- n. An operative person or thing. [ R. ] Coleridge. [ 1913 Webster ]

n. (Psychol.) A process for causing animals to behave in a specific manner by rewarding or punishing the animal each time it performs a certain act; after a time, the animal comes to associate the reward or punishment with the act, and will increase or decrease the frequency of performing that act. [ PJC ]

v. i. [ imp. & p. p. Operated p. pr. & vb. n. Operating. ] [ L. operatus, p. p. of operari to work, fr. opus, operis, work, labor; akin to Skr. apas, and also to G. üben to exercise, OHG. uoben, Icel. æfa. Cf. Inure, Maneuver, Ure. ] 1. To perform a work or labor; to exert power or strength, physical or mechanical; to act. [ 1913 Webster ]

2. To produce an appropriate physical effect; to issue in the result designed by nature; especially (Med.), to take appropriate effect on the human system. [ 1913 Webster ]

3. To act or produce effect on the mind; to exert moral power or influence. [ 1913 Webster ]

The virtues of private persons operate but on a few. Atterbury. [ 1913 Webster ]

A plain, convincing reason operates on the mind both of a learned and ignorant hearer as long as they live. Swift. [ 1913 Webster ]

4. (Surg.) To perform some manual act upon a human body in a methodical manner, and usually with instruments, with a view to restore soundness or health, as in amputation, lithotomy, etc. [ 1913 Webster ]

5. To deal in stocks or any commodity with a view to speculative profits. [ Brokers' Cant ] [ 1913 Webster ]

v. t. 1. To produce, as an effect; to cause. [ 1913 Webster ]

The same cause would operate a diminution of the value of stock. A. Hamilton. [ 1913 Webster ]

2. To put into, or to continue in, operation or activity; to work; as, to operate a machine. [ 1913 Webster ]

{ } a. Of or pertaining to the opera or to operas; characteristic of, suitable for, or resembling, the opera; as, an operatic voice. [ 1913 Webster +PJC ]

adj. 1. pr. p. of operate; as, the operating conditions of the oxidation pond. [ WordNet 1.5 ]

2. having an effect or influence.
Syn. -- at work(predicate), in operation, operant. [ WordNet 1.5 ]

n. [ L. operatio: cf. F. opération. ] 1. The act or process of operating; agency; the exertion of power, physical, mechanical, or moral. [ 1913 Webster ]

The pain and sickness caused by manna are the effects of its operation on the stomach. Locke. [ 1913 Webster ]

Speculative painting, without the assistance of manual operation, can never attain to perfection. Dryden. [ 1913 Webster ]

2. The method of working; mode of action. [ 1913 Webster ]

3. That which is operated or accomplished; an effect brought about in accordance with a definite plan; as, military or naval operations. [ 1913 Webster ]

4. Effect produced; influence. [ Obs. ] [ 1913 Webster ]

The bards . . . had great operation on the vulgar. Fuller. [ 1913 Webster ]

5. (Math.) Something to be done; some transformation to be made upon quantities or mathematical objects, the transformation being indicated either by rules or symbols. [ 1913 Webster ]

6. (Surg.) Any methodical action of the hand, or of the hand with instruments, on the human body, to produce a curative or remedial effect, as in amputation, etc. [ 1913 Webster ]

Calculus of operations. See under Calculus. [ 1913 Webster ]

adj. 1. of or pertaining to operations; as, operational procedure. [ WordNet 1.5 ]

2. Fit or ready for service; available and in working condition; as, an operational aircraft. Opposite of out-of-service.
Syn. -- functional, usable, useable, in order(predicate), in working order(predicate), operable. [ WordNet 1.5 ]

3. (Mil.) of or intended for or involved in military operations. Opposite of nonoperational. [ WordNet 1.5 ]

4. In force; not expired or annulled; -- of rules or laws. [ WordNet 1.5 ]

de facto apartheid still operational even in the `new' African nations Leslie Marmon Silko [ WordNet 1.5 ]

n. (Philos.) the doctrine that the meaning of a proposition consists of the operations involved in defining, proving, or applying it. [ WordNet 1.5 ]

adj. (Philos.) Of or pertaining to operationalism. operationalist doctrine [ WordNet 1.5 ]

n. (Finance) financial transactions at a brokerage; having to do with the execution of trades and keeping customer records.
Syn. -- trading operations. [ WordNet 1.5 ]

a. [ Cf.L. operativus, F. opératif. ] 1. Having the power of acting; hence, exerting force, physical or moral; active in the production of effects; as, an operative motive; operative laws. [ 1913 Webster ]

It holds in all operative principles. South. [ 1913 Webster ]

2. Producing the appropriate or designed effect; efficacious; effective; as, an operative dose, rule, or penalty. [ 1913 Webster ]

3. (Surg.) Based upon, or consisting of, an operation or operations; as, operative surgery. [ 1913 Webster ]

n. 1. A skilled worker; an artisan; esp., one who operates a machine in a mill or manufactory. [ 1913 Webster ]

2. One who acts as an agent of another, especially a detective or spy. [ PJC ]

adv. In an operative manner. [ 1913 Webster ]

n. [ L. ] 1. One who, or that which, operates or produces an effect. [ 1913 Webster ]

2. (Surg.) One who performs some act upon the human body by means of the hand, or with instruments. [ 1913 Webster ]

3. A dealer in stocks or any commodity for speculative purposes; a speculator. [ Brokers' Cant ] [ 1913 Webster ]

4. (Math.) The symbol that expresses the operation to be performed; -- called also facient. [ 1913 Webster ]

5. A person who operates a telephone switchboard. [ PJC ]

6. A person who schemes and maneuvers adroitly or deviously to achieve his/her purposes. [ PJC ]

n. A laboratory. [ Obs. ] [ 1913 Webster ]

v. t. & i. [ L. properatus, p. p. of properare to hasten. ] To hasten, or press forward. [ Obs. ] [ 1913 Webster ]

n. [ L. properatio. ] The act of hastening; haste. [ Obs. ] T. Adams. [ 1913 Webster ]

a. Producing no effect; inoperative. [ Obs. ] South. [ 1913 Webster ]