Glossary · Nouns · D
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TermTypeDefinitionClassificationsUpdated
Default JudgmentnounMWEa judgment entered in favor of the plaintiff when the defendant fails to appear in courtverified
Default OptionnounMWEan option that is selected automatically unless an alternative is specifiedverified
default passwordnounMWEPassword on system administration, user, or service accounts predefined in a system, application, or device; usually associated with default account. Default accounts and passwords are published and well known, and therefore easily guessed.Credential
Defectionnounthe state of having rejected your religious beliefs or your political party or a cause (often in favor of opposing beliefs or causes)verified
Defective PleadingnounMWEany pleading that fails to conform in form or substance to minimum standards of accuracy or sufficiencyverified
Defencenounan unconscious process that tries to reduce the anxiety associated with instinctive desiresverified
defence in depthnounMWEThe security controls deployed throughout the various layers of the network to provide for resiliency in the event of the failure or the exploitation of a vulnerability of another control (may also be referred to as “layered protection”).Control
Defence MechanismnounMWE(psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desiresverified
Defence ReactionnounMWE(psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desiresverified
Defending TeamnounMWE(sports) the team that is trying to prevent the other team from scoringverified
Defensenounan unconscious process that tries to reduce the anxiety associated with instinctive desiresverified
Defense ContractornounMWEa contractor concerned with the development and manufacture of systems of defenseverified
Defense in depthnounMWEThe practice of layering defenses to provide added protection Defense in depth increases security by raising the effort needed in an attack. This strategy places multiple barriers between an attacker and an enterprise's computing and information resources.Capability
Defense LaboratorynounMWEa laboratory devoted to research and development for national defenseverified
Defense MechanismnounMWE(psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desiresverified
Defense ReactionnounMWE(psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desiresverified
Defense-in-BreadthnounA planned, systematic set of multidisciplinary activities that seek to identify, manage, and reduce risk of exploitable vulnerabilities at every stage of the system, network, or sub-component life cycle (system, network, or product design and development; manufacturing; packaging; assembly; system integration; distribution; operations; maintenance; and retirement).Control
Defensive AttitudenounMWEan attitude of defensiveness (especially in the phrase `on the defensive')verified
Defensive MeasurenounMWEAn action taken to avoid or prevent danger from outside threats. Often used in a military or natural-disaster context.verified
Defibrillationnountreatment by stopping fibrillation of heart muscles (usually by electric shock delivered by a defibrillator)verified
Defibrillatornounan electronic device that administers an electric shock of preset voltage to the heart through the chest wall in an attempt to restore the normal rhythm of the heart during ventricular fibrillationverified
Deficiency DiseasenounMWEany disease caused by a lack of an essential nutrient (as a vitamin or mineral)verified
Deficitnounthe property of being an amount by which something is less than expected or requiredverified
defined periodnounMWEA policy-established, organization-configurable duration of elapsed time—measured in minutes, hours, or days—that serves as a threshold triggering an automated security enforcement action when that duration expires without the expected activity. Across NIST SP 800-53/800-171, CIS Controls, PCI DSS, ISO/IEC 27001, and HIPAA, it functions as the configurable variable inside controls such as session locking, session termination, account disablement, and token expiry: the control specifies *that* enforcement must occur automatically, while the defined period is the organization-set value governing *when* it fires. It is intentionally left as a parameter rather than a fixed value in most frameworks because the appropriate threshold varies by asset type, data sensitivity, and risk posture—though regulators sometimes cap it (e.g., PCI DSS at 15 minutes for idle sessions, CIS Controls at 15 minutes for general-purpose OSes and 2 minutes for mobile devices).RequirementRegulated
Definite ArticlenounMWEa determiner (as `the' in English) that indicates specificity of referenceverified
Deflagrationnouncombustion that propagates through a gas or along the surface of an explosive at a rapid rate driven by the transfer of heatverified
Deflationnoun(geology) the erosion of soil as a consequence of sand and dust and loose rocks being removed by the windverified
Deflationary SpiralnounMWEan episode of deflation in which prices and wages decrease at an increasing rate and currency gains in valueverified
Deflectionnounthe movement of the pointer or pen of a measuring instrument from its zero positionverified
Deflectornouna device intended to turn aside the flow of something (water or air or smoke etc)verified
Deflexionnounthe movement of the pointer or pen of a measuring instrument from its zero positionverified
Deflorationnounthe act of depriving a woman of her virginity (especially by rupturing the hymen through sexual intercourse)verified
Defoliationnouncausing the leaves of trees and other plants to fall off (as by the use of chemicals)verified
Deformationnounalteration in the shape or dimensions of an object as a result of the application of stress to itverified
Defrosternounheater that removes ice or frost, as from car windows, a refrigerator, or the wings of an airplaneverified
DegaussnounProcedure that reduces the magnetic flux to virtual zero by applying a reverse magnetizing field. Also called demagnetizing.ProcessRegulatedCUI
Degaussingnounthe process of making a (steel) ship's hull nonmagnetic by producing an opposing magnetic fieldverified
Degenerationnounthe process of declining from a higher to a lower level of effective power or vitality or essential qualityverified