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Glossary · Nouns · O

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TermTypeDefinitionClassificationsUpdated
O RingnounMWEa gasket consisting of a flat ring of rubber or plasticverifiedMay 18, 2026
Oafnounan awkward stupid personverifiedMay 18, 2026
Oaknouna deciduous tree of the genus QuercusverifiedMay 18, 2026
Oak ApplenounMWEoak gall caused by larvae of a cynipid waspverifiedMay 18, 2026
Oak BlightnounMWEa black plant louse that lives on oaks and dogwoodsverifiedMay 18, 2026
Oak ChestnutnounMWEa tree of the genus CastanopsisverifiedMay 18, 2026
Oak FernnounMWEbright blue-green fern widely distributed especially in damp acid woodlands of temperate northern hemisphereverifiedMay 18, 2026
Oak TreenounMWEa deciduous tree of the genus QuercusverifiedMay 18, 2026
Oak-Leaved GoosefootnounMWEannual European plant with spikes of greenish flowers and leaves that are white and hairy on the undersideverifiedMay 18, 2026
Oakleaf GoosefootnounMWEannual European plant with spikes of greenish flowers and leaves that are white and hairy on the undersideverifiedMay 18, 2026
Oakumnounloose hemp or jute fiber obtained by unravelling old ropesverifiedMay 18, 2026
Oarnounan implement used to propel or steer a boatverifiedMay 18, 2026
Oarfishnounthin deep-water tropical fish 20 to 30 feet long having a red dorsal finverifiedMay 18, 2026
Oarlocknouna holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowingverifiedMay 18, 2026
Oarsmannounsomeone who rows a boatverifiedMay 18, 2026
Oarsmanshipnounskill as an oarsmanverifiedMay 18, 2026
Oarswomannouna woman oarsmanverifiedMay 18, 2026
Oasisnouna fertile tract in a desert, where the water table approaches the surfaceverifiedMay 18, 2026
Oastnouna kiln for drying hopsverifiedMay 18, 2026
Oast HousenounMWEa building containing an oast (a kiln for drying hops)verifiedMay 18, 2026
Oatnounseed of the annual grass Avena sativa (spoken of primarily in the plural as `oats')verifiedMay 18, 2026
Oat Cell CarcinomanounMWEhighly malignant carcinoma composed of small round or egg-shaped cells with little cytoplasmverifiedMay 18, 2026
Oatcakenounthin flat unleavened cake of baked oatmealverifiedMay 18, 2026
Oathnouna solemn promise, usually invoking a divine witness, regarding your future acts or behaviorverifiedMay 18, 2026
Oatmealnounmeal made from rolled or ground oatsverifiedMay 18, 2026
Oatmeal CookienounMWEcookies containing rolled oatsverifiedMay 18, 2026
Obbligatonouna part of the score that must be performed without change or omissionverifiedMay 18, 2026
Obduracynounresoluteness by virtue of being unyielding and inflexibleverifiedMay 18, 2026
Obeahnoun(West Indies) followers of a religious system involving witchcraft and sorceryverifiedMay 18, 2026
Obechenounlarge west African tree having large palmately lobed leaves and axillary cymose panicles of small white flowers and one-winged seedsverifiedMay 18, 2026
Obechinounlarge west African tree having large palmately lobed leaves and axillary cymose panicles of small white flowers and one-winged seedsverifiedMay 18, 2026
Obediencenounbehavior intended to please your parentsverifiedMay 18, 2026
Obedience PlantnounMWEwhite-flowered West Indian plant whose root yields arrowroot starchverifiedMay 18, 2026
Obedient PlantnounMWENorth American plant having a spike of two-lipped pink or white flowersverifiedMay 18, 2026
Obeisancenounbending the head or body or knee as a sign of reverence or submission or shame or greetingverifiedMay 18, 2026
Obelionnounthe craniometric point on the sagittal suture near the lamboid sutureverifiedMay 18, 2026
Obelisknouna stone pillar having a rectangular cross section tapering towards a pyramidal topverifiedMay 18, 2026
Obesitynounmore than average fatnessverifiedMay 18, 2026
Obesity DietnounMWEa diet designed to help you lose weight (especially fat)verifiedMay 18, 2026
ObfuscationnounThe deliberate act of creating source or machine code that is difficult for humans to understandControlMay 9, 2026
Obinoun(West Indies) followers of a religious system involving witchcraft and sorceryverifiedMay 18, 2026
Obidoxime ChloridenounMWEa chloride used as an antidote for nerve gases such as sarin or VXverifiedMay 18, 2026
Obiismnounbelief in a kind of sorcery that originated in Africa and is practiced in the West IndiesverifiedMay 18, 2026
Obitnouna notice of someone's deathverifiedMay 18, 2026
Obiter DictumnounMWEan opinion voiced by a judge on a point of law not directly bearing on the case in question and therefore not bindingverifiedMay 18, 2026
Obituarynouna notice of someone's deathverifiedMay 18, 2026
objectnounPassive information system-related entity (e.g., devices, files, records, tables, processes, programs, domains) containing or receiving information. Access to an object (by a subject) implies access to the information it contains. See Subject.DataMay 9, 2026
Object BallnounMWEthe billiard ball that is intended to be the first ball struck by the cue ballverifiedMay 18, 2026
Object codenounMWEThe machine code generated by a source code language processor such as an assembler or compiler. A file of object code may be executable immediately or it may require linking with other object code files (e.g., libraries, to produce a complete executable program).DataMay 12, 2026
Object GlassnounMWEthe lens or system of lenses in a telescope or microscope that is nearest the object being viewedverifiedMay 18, 2026
Object IdentifiernounMWEA specialized formatted number that is registered with an internationally recognized standards organization. The unique alphanumeric/numeric identifier registered under the ISO registration standard to reference a specific object or object class. In the federal government PKI, they are used to uniquely identify each of the four policies and cryptographic algorithms supported.ArtifactRegulatedCUIMay 12, 2026
Object LanguagenounMWEa computer language into which something written in another computer language is to be translatedverifiedMay 18, 2026
Object LensnounMWEthe lens or system of lenses in a telescope or microscope that is nearest the object being viewedverifiedMay 18, 2026
Object LessonnounMWEpunishment intended as a warning to othersverifiedMay 18, 2026
Object of a PrepositionnounMWEthe object governed by a prepositionverifiedMay 18, 2026
Object of the VerbnounMWEthe object that receives the direct action of the verbverifiedMay 18, 2026
Object ProgramnounMWEA program that has been translated into machine language and is ready to be run (i.e., executed) by the computer.ArtifactMay 12, 2026
Object RecognitionnounMWEthe visual perception of familiar objectsverifiedMay 18, 2026
Object ReusenounMWEReassignment and reuse of a storage medium containing one or more objects after ensuring no residual data remains on the storage medium.ControlRegulatedMay 12, 2026
Object-Oriented DatabasenounMWEa database in which the operations carried out on information items (data objects) are considered part of their definitionverifiedMay 18, 2026
Object-Oriented Database Management SystemnounMWEa database management system designed to manage an object-oriented databaseverifiedMay 18, 2026
Object-Oriented ProgramingnounMWEcreating a program that can use and support objectsverifiedMay 18, 2026
Object-Oriented Programing LanguagenounMWE(computer science) a programming language that enables the programmer to associate a set of procedures with each type of data structureverifiedMay 18, 2026
Object-Oriented ProgrammingnounMWEcreating a program that can use and support objectsverifiedMay 18, 2026
Object-Oriented Programming LanguagenounMWE(computer science) a programming language that enables the programmer to associate a set of procedures with each type of data structureverifiedMay 18, 2026
Objectificationnounthe act of representing an abstraction as a physical thingverifiedMay 18, 2026
Objectionnouna procedure whereby a party to a suit says that a particular line of questioning, witness, piece of evidence, or other matter is improper and should not be continued and asks the court to rule on its impropriety or illegalityverifiedMay 18, 2026
Objectionablenessnounthe quality of being hatefulverifiedMay 18, 2026
objectivenounA projected state of affairs that a person or a system plans or intends to achieve a personal or organizational desired end-point in some sort of assumed development. Many people endeavor to reach goals within a finite time by setting deadlines.RequirementMay 9, 2026
Objective CasenounMWEthe case of nouns serving as the direct object of a verbverifiedMay 18, 2026
Objective EvidencenounMWEdata supporting the existence or verity of something (note: can be obtained through observation, measurement, test, or other means).ArtifactMay 18, 2026
Objective LensnounMWEthe lens or system of lenses in a telescope or microscope that is nearest the object being viewedverifiedMay 18, 2026
Objectivenessnounjudgment based on observable phenomena and uninfluenced by emotions or personal prejudicesverifiedMay 18, 2026
objectivitynounThe quality of being not influenced by personal feelings or opinions in considering and representing facts.RequirementMay 9, 2026
Objectornouna person who dissents from some established policyverifiedMay 18, 2026
Objet D'artnounMWEa work of art of some artistic valueverifiedMay 18, 2026
Objurgationnounrebuking a person harshlyverifiedMay 18, 2026
Oblanceolate LeafnounMWEa leaf having a rounded apex and tapering baseverifiedMay 18, 2026
Oblatenessnounthe property possessed by a round shape that is flattened at the polesverifiedMay 18, 2026
Oblationnounthe act of contributing to the funds of a church or charityverifiedMay 18, 2026
Obligate AnaerobenounMWEan organism that cannot grow in the presence of oxygenverifiedMay 18, 2026
obligationnounA binding agreement committing a person to an immediate or future payment or other action.RequirementMay 9, 2026
Obligatonouna part of the score that must be performed without change or omissionverifiedMay 18, 2026
Obligernounsomeone who performs a service or does a favorverifiedMay 18, 2026
Obligingnessnouna disposition or tendency to yield to the will of othersverifiedMay 18, 2026
Oblique AnglenounMWEan angle that is not a right angle or a multiple of a right angleverifiedMay 18, 2026
Oblique BandagenounMWEa bandage in which successive turns proceed obliquely up or down a limbverifiedMay 18, 2026
Oblique CasenounMWEany grammatical case other than the nominativeverifiedMay 18, 2026
Oblique TrianglenounMWEa triangle that contains no right angleverifiedMay 18, 2026
Oblique Vein of the Left AtriumnounMWEa tributary of the coronary sinusverifiedMay 18, 2026
Obliquenessnounthe property of being neither parallel nor perpendicular, but at a slanting angleverifiedMay 18, 2026
Obliquitynounthe presentation during labor of the head of the fetus at an abnormal angleverifiedMay 18, 2026
Obliterationnounthe complete destruction of every trace of somethingverifiedMay 18, 2026
Obliteratornounan eliminator that does away with all tracesverifiedMay 18, 2026
Oblivionnounthe state of being disregarded or forgottenverifiedMay 18, 2026
Obliviousnessnountotal forgetfulnessverifiedMay 18, 2026
Oblong LeafnounMWEa simple leaf that is rounded at each end with parallel sidesverifiedMay 18, 2026
Oblong WoodsianounMWEa common rock-inhabiting fern of northern temperate regions having rusty-brown stipes and lanceolate pinnate frondsverifiedMay 18, 2026
Oblongnessnounthe property of being shaped like a rectangleverifiedMay 18, 2026
Obloquynouna false accusation of an offense or a malicious misrepresentation of someone's words or actionsverifiedMay 18, 2026