Open (v. t.) To spread; to expand; as, to open the hand.
Open (v. t.) To disclose; to reveal; to interpret; to explain.
Open (v. t.) To make known; to discover; also, to render available or accessible for settlements, trade, etc.
Open (v. t.) To enter upon; to begin; as, to open a discussion; to open fire upon an enemy; to open trade, or correspondence; to open a case in court, or a meeting.
Open (v. t.) To loosen or make less compact; as, to open matted cotton by separating the fibers.
Open (v. i.) To unclose; to form a hole, breach, or gap; to be unclosed; to be parted.
Open (v. i.) To expand; to spread out; to be disclosed; as, the harbor opened to our view.
Open (v. i.) To begin; to commence; as, the stock opened at par; the battery opened upon the enemy.
Open (v. i.) To bark on scent or view of the game.
Open-air (a.) Taking place in the open air; outdoor; as, an open-air game or meeting.
Openbill (n.) A bird of the genus Anastomus, allied to the stork; -- so called because the two parts of the bill touch only at the base and tip. One species inhabits India, another Africa. Called also open-beak. See Illust. (m), under Beak.
Opener (n.) One who, or that which, opens.
Open-eyed (a.) With eyes widely open; watchful; vigilant.
Open-handed (a.) Generous; liberal; munificent.
Open-headed (a.) Bareheaded.
Open-hearted (a.) Candid; frank; generous.
Opening (n.) The act or process of opening; a beginning; commencement; first appearance; as, the opening of a speech.
Opening (n.) A place which is open; a breach; an aperture; a gap; cleft, or hole.
Opening (n.) Hence: A vacant place; an opportunity; as, an opening for business.
Opening (n.) A thinly wooded space, without undergrowth, in the midst of a forest; as, oak openings.
Openly (adv.) In an open manner; publicly; not in private; without secrecy.
Openly (adv.) Without reserve or disguise; plainly; evidently.
Open-mouthed (a.) Having the mouth open; gaping; hence, greedy; clamorous.
Openness (n.) The quality or state of being open.
Openwork (n.) Anything so constructed or manufactured (in needlework, carpentry, metal work, etc.) as to show openings through its substance; work that is perforated or pierced.
Openwork (n.) A quarry; an open cut.
Opera (n.) A drama, either tragic or comic, of which music forms an essential part; a drama wholly or mostly sung, consisting of recitative, arials, choruses, duets, trios, etc., with orchestral accompaniment, preludes, and interludes, together with appropriate costumes, scenery, and action; a lyric drama.
Opera (n.) The score of a musical drama, either written or in print; a play set to music.
Opera (n.) The house where operas are exhibited.
Operable (a.) Practicable.
Operameter (n.) 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.
Operance (n.) Alt. of Operancy
Operancy (n.) The act of operating or working; operation.
Operand (n.) The symbol, quantity, or thing upon which a mathematical operation is performed; -- called also faciend.
Operant (a.) Operative.
Operant (n.) An operative person or thing.
Operated (imp. & p. p.) of Operate
Operating (p. pr. & vb. n.) of Operate
Operate (v. i.) To perform a work or labor; to exert power or strengh, physical or mechanical; to act.
Operate (v. i.) To produce an appropriate physical effect; to issue in the result designed by nature; especially (Med.), to take appropriate effect on the human system.
Operate (v. i.) To act or produce effect on the mind; to exert moral power or influence.
Operate (v. i.) 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.
Operate (v. i.) To deal in stocks or any commodity with a view to speculative profits.
Operate (v. t.) To produce, as an effect; to cause.
Operate (v. t.) To put into, or to continue in, operation or activity; to work; as, to operate a machine.
Operatic (a.) Alt. of Operatical
Operatical (a.) Of or pertaining to the opera or to operas; characteristic of, or resembling, the opera.
Operation (n.) The act or process of operating; agency; the exertion of power, physical, mechanical, or moral.
Operation (n.) The method of working; mode of action.
Operation (n.) That which is operated or accomplished; an effect brought about in accordance with a definite plan; as, military or naval operations.
Operation (n.) Effect produced; influence.
Operation (n.) Something to be done; some transformation to be made upon quantities, the transformation being indicated either by rules or symbols.
Operation (n.) 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.
Operative (a.) Having the power of acting; hence, exerting force, physical or moral; active in the production of effects; as, an operative motive.
Operative (a.) Producing the appropriate or designed effect; efficacious; as, an operative dose, rule, or penalty.
Operative (a.) Based upon, or consisting of, an operation or operations; as, operative surgery.
Operative (n.) A skilled worker; an artisan; esp., one who operates a machine in a mill or manufactory.
Operatively (adv.) In an operative manner.
Operator (n.) One who, or that which, operates or produces an effect.
Operator (n.) One who performs some act upon the human body by means of the hand, or with instruments.
Operator (n.) A dealer in stocks or any commodity for speculative purposes; a speculator.
Operator (n.) The symbol that expresses the operation to be performed; -- called also facient.
Operatory (n.) A laboratory.
Opercle (n.) Any one of the bony plates which support the gill covers of fishes; an opercular bone.
Opercle (n.) An operculum.
Opercula (n. pl.) See Operculum.
Oparcular (a.) Of, pertaining to, or like, an operculum.
Opercular (n.) The principal opercular bone or operculum of fishes.
Operculate (a.) Alt. of Operculated
Operculated (a.) Closed by a lid or cover, as the capsules of the mosses.
Operculated (a.) Having an operculum, or an apparatus for protecting the gills; -- said of shells and of fishes.
Operculiferous (a.) Bearing an operculum.
Operculiform (a.) Having the form of a lid or cover.
Operculigenous (a.) Producing an operculum; -- said of the foot, or part of the foot, of certain mollusks.
Opercula (pl. ) of Operculum
Operculums (pl. ) of Operculum
Operculum (n.) The lid of a pitcherform leaf.
Operculum (n.) The lid of the urnlike capsule of mosses.
Operculum (n.) Any lidlike or operculiform process or part; as, the opercula of a dental follicle.
Operculum (n.) The fold of integument, usually supported by bony plates, which protects the gills of most fishes and some amphibians; the gill cover; the gill lid.
Operculum (n.) The principal opercular bone in the upper and posterior part of the gill cover.
Operculum (n.) The lid closing the aperture of various species of shells, as the common whelk. See Illust. of Gastropoda.
Operculum (n.) Any lid-shaped structure closing the aperture of a tube or shell.
Operetta (n.) A short, light, musical drama.
Operose (a.) Wrought with labor; requiring labor; hence, tedious; wearisome.
Operosity (n.) Laboriousness.
Operous (a.) Operose.
Opertaneous (a.) Concealed; private.
Opetide (n.) Open time; -- applied to different things
Opetide (n.) The early spring, or the time when flowers begin opening.
Opetide (n.) The time between Epiphany and Ash Wednesday wherein marriages were formerly solemnized publicly in churches. [Eng.]
Opetide (n.) The time after harvest when the common fields are open to all kinds of stock.
Ophelic (a.) Of, pertaining to, or designating, a substance (called ophelic acid) extracted from a plant (Ophelia) of the Gentian family as a bitter yellowish sirup, used in India as a febrifuge and tonic.
Ophicleide (n.) A large brass wind instrument, formerly used in the orchestra and in military bands, having a loud tone, deep pitch, and a compass of three octaves; -- now generally supplanted by bass and contrabass tubas.
Ophidia (n. pl.) The order of reptiles which includes the serpents.
Ophidian (n.) One of the Ophidia; a snake or serpent.
Ophidian (a.) Of or pertaining to the Ophidia; belonging to serpents.
Ophidioid (a.) Of or pertaining to the Ophidiidae, a family of fishes which includes many slender species.
Ophidioid (n.) One of the Ophidiidae.
Ophidia (pl. ) of Ophidion