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Glossary · Nouns · I

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TermTypeDefinitionClassificationsUpdated
Insertional MutagenesisnounMWE(genetics) a mutation caused by the insertion of exogenous DNA into a genomeverifiedMay 18, 2026
InsidenounAn entity with authorized access (i.e., within the security domain) that has the potential to harm an information system or enterprise through destruction, disclosure, modification of data, and/or denial of service.ThreatMay 12, 2026
Inside CalipernounMWEcaliper for measuring inside dimensions (the size of a cavity or hole)verifiedMay 18, 2026
Inside ClinchnounMWEa clinch with the end of the line inside the loopverifiedMay 18, 2026
Inside InformationnounMWEtrue confidential informationverifiedMay 18, 2026
Inside JobnounMWEsome transgression committed with the assistance of someone trusted by the victimverifiedMay 18, 2026
Inside LoopnounMWEa loop consisting of a climb followed by inverted flight followed by a dive that returns to horizontal flightverifiedMay 18, 2026
Inside ThreatnounMWEAn entity with authorized access that has the potential to harm an information system through destruction, disclosure, modification of data, and/or denial of service.ThreatMay 9, 2026
Inside TracknounMWEa favorable position in a competitionverifiedMay 18, 2026
inside( r) threatnounMWEA person or group of persons within an organization who pose a potential risk through violating security policies.ThreatRestrictedMay 9, 2026
Insidernounan officer of a corporation or others who have access to private information about the corporation's operationsverifiedMay 18, 2026
Insider AttacknounMWEThose who are within [an] organisation may have authorised access to vast amounts of sensitive company records that are essential for maintaining competitiveness and market position, and knowledge of information services and procedures that are crucial for daily operations. . . .[and] should an individual choose to act against the organisation, then with their privileged access and their extensive knowledge, they are well positioned to cause serious damage.ThreatAug 28, 2026
Insider InformationnounMWEimportant information about the plans or condition of a corporation that has not been released to the publicverifiedMay 18, 2026
insider threatnounMWEThe threat that an insider will use their authorized access, wittingly or unwittingly, to do harm to the security of the United States. This threat can include damage to the United States through espionage, terrorism, unauthorized disclosure, or through the loss or degradation of departmental resources or capabilities.ThreatRegulatedCUIAug 30, 2026
Insider TradingnounMWEbuying or selling corporate stock by a corporate officer or other insider on the basis of information that has not been made public and is supposed to remain confidentialverifiedMay 18, 2026
Insidiousnessnounsubtle and cumulative harmfulness (especially of a disease)verifiedMay 18, 2026
Insightnounthe clear (and often sudden) understanding of a complex situationverifiedMay 18, 2026
Insightfulnessnounshrewdness shown by keen insightverifiedMay 18, 2026
Insignianouna badge worn to show official positionverifiedMay 18, 2026
Insignia of RanknounMWEan insignia worn on a military uniformverifiedMay 18, 2026
Insignificancenounthe quality of having little or no significanceverifiedMay 18, 2026
Insinceritynounthe quality of not being open or truthfulverifiedMay 18, 2026
Insinuationnounthe act of gaining acceptance or affection for yourself by persuasive and subtle blandishmentsverifiedMay 18, 2026
Insipiditynounlacking any distinctive or interesting taste propertyverifiedMay 18, 2026
Insipidnessnounlacking any distinctive or interesting taste propertyverifiedMay 18, 2026
Insistencenounthe state of demanding notice or attentionverifiedMay 18, 2026
Insistencynounthe state of demanding notice or attentionverifiedMay 18, 2026
Insistingnouncontinual and persistent demandsverifiedMay 18, 2026
Insobrietynouna temporary state resulting from excessive consumption of alcoholverifiedMay 18, 2026
Insolationnounsudden prostration due to exposure to the sun or excessive heatverifiedMay 18, 2026
Insolenounthe inner sole of a shoe or boot where the foot restsverifiedMay 18, 2026
Insolencenounan offensive disrespectful impudent actverifiedMay 18, 2026
Insolubilitynounthe property (of a problem or difficulty) that makes it impossible to solveverifiedMay 18, 2026
Insolvencynounthe lack of financial resourcesverifiedMay 18, 2026
Insomnianounan inability to sleepverifiedMay 18, 2026
Insouciancenounthe cheerful feeling you have when nothing is troubling youverifiedMay 18, 2026
Inspectable SpacenounMWEThree dimensional space surrounding equipment that processes classified and/or sensitive information within which TEMPEST exploitation is not considered practical or where legal authority to identify and remove a potential TEMPEST exploitation exists. Synonymous with zone of control.PhysicalRegulatedCUIMay 9, 2026
Inspectionnouna formal or official examinationverifiedMay 18, 2026
Inspection and RepairnounMWEperiodic maintenance on a car or machineverifiedMay 18, 2026
Inspectornounan investigator who observes carefullyverifiedMay 18, 2026
Inspector GeneralnounMWEa military officer responsible for investigationsverifiedMay 18, 2026
Inspectoratenouna body of inspectorsverifiedMay 18, 2026
Inspectorshipnounthe office of inspectorverifiedMay 18, 2026
Inspirationnoun(theology) a special influence of a divinity on the minds of human beingsverifiedMay 18, 2026
Inspirernouna leader who stimulates and excites people to actionverifiedMay 18, 2026
Inspissationnounthe process of thickening by dehydrationverifiedMay 18, 2026
Instabilitynounthe quality or attribute of being unstable and irresoluteverifiedMay 18, 2026
installnounSet up for use.ProcessMay 9, 2026
Installationnouna building or place that provides a particular service or is used for a particular industryverifiedMay 18, 2026
Installation ChargenounMWEthe charge for installing somethingverifiedMay 18, 2026
Installingnounthe act of installing something (as equipment)verifiedMay 18, 2026
Installmentnounthe act of installing something, as equipmentverifiedMay 18, 2026
Installment BuyingnounMWEa system for paying for goods by installmentsverifiedMay 18, 2026
Installment CreditnounMWEa loan repaid with interest in equal periodic paymentsverifiedMay 18, 2026
Installment DebtnounMWEdebt to be paid by installmentsverifiedMay 18, 2026
Installment LoannounMWEa loan repaid with interest in equal periodic paymentsverifiedMay 18, 2026
Installment PlannounMWEa system for paying for goods by installmentsverifiedMay 18, 2026
Installment RatenounMWEthe amount of money paid out per unit timeverifiedMay 18, 2026
Instalmentnounthe act of installing something, as equipmentverifiedMay 18, 2026
InstancenounA single object of the world from which a model will be learned, or on which a model will be used (e.g., for prediction).DataMay 18, 2026
Instance WeightnounMWEA numerical value that multiplies the contribution of a data point in a model.MetricAug 28, 2026
Instancynounthe quickness of action or occurrenceverifiedMay 18, 2026
Instant CoffeenounMWEdehydrated coffee that can be made into a drink by adding hot waterverifiedMay 18, 2026
Instant ReplaynounMWEthe immediate rebroadcast of some action (especially sports action) that has been recorded on videotapeverifiedMay 18, 2026
Instantaneous Sound PressurenounMWEthe difference between the instantaneous pressure at a point in a sound field and the average pressure at that pointverifiedMay 18, 2026
Instantaneousnessnounthe quickness of action or occurrenceverifiedMay 18, 2026
Instantiationnouna representation of an idea in the form of an instance of itverifiedMay 18, 2026
Instarnounan insect or other arthropod between moltsverifiedMay 18, 2026
Instaurationnounthe act of starting something for the first timeverifiedMay 18, 2026
Instepnounthe part of a shoe or stocking that covers the arch of the footverifiedMay 18, 2026
Instigantnounsomeone who deliberately foments troubleverifiedMay 18, 2026
Instigationnoundeliberate and intentional triggering (of trouble or discord)verifiedMay 18, 2026
Instigatornouna person who initiates a course of actionverifiedMay 18, 2026
Instillationnounthe introduction of a liquid by pouring or injection drop by dropverifiedMay 18, 2026
Instillatornounmedical apparatus that puts a liquid into a cavity drop by dropverifiedMay 18, 2026
Instillingnounteaching or impressing upon the mind by frequent instruction or repetitionverifiedMay 18, 2026
Instillmentnounthe introduction of a liquid (by pouring or injection) drop by dropverifiedMay 18, 2026
Instilmentnounthe introduction of a liquid (by pouring or injection) drop by dropverifiedMay 18, 2026
Instinctive ReflexnounMWEan automatic instinctive unlearned reaction to a stimulusverifiedMay 18, 2026
Institute of Electrical and Electronics EngineersnounMWEPronounced I-triple-E; IEEE is an organization composed of engineers, scientists and students Scope Note: Best known for developing standards for the computer and electronics industryOrganizationAug 28, 2026
institutionnounAn organization founded for a specific purpose, such as religious, educational, professional, or social.OrganizationMay 9, 2026
Instrokenounthe stroke of an engine piston moving away from the crankshaftverifiedMay 18, 2026
InstructionnounMeans (i) any instruction submitted by a Member through the submission process directing CLS Bank to settle certain payment entitlements and obligations arising pursuant to an FX transaction eligible for settlement in CLS Bank and (ii) any instructions resulting from the split of Settlement Eligible Instructions.RequirementMay 12, 2026
Instruction BooknounMWEa book of directions for using or operating some piece of equipmentverifiedMay 18, 2026
Instruction ExecutionnounMWE(computer science) the process of carrying out an instruction by a computerverifiedMay 18, 2026
Instruction ManualnounMWEa manual usually accompanying a technical device and explaining how to install or operate itverifiedMay 18, 2026
Instructornouna person whose occupation is teachingverifiedMay 18, 2026
Instructorshipnounthe position of instructorverifiedMay 18, 2026
Instructressnouna woman instructorverifiedMay 18, 2026
Instrument FlyingnounMWEnavigation of an airplane solely by instrumentsverifiedMay 18, 2026
Instrument LandingnounMWEan aircraft landing made entirely by means of instrumentsverifiedMay 18, 2026
Instrument of ExecutionnounMWEan instrument designed and used to take the life of a condemned personverifiedMay 18, 2026
Instrument of PunishmentnounMWEan instrument designed and used to punish a condemned personverifiedMay 18, 2026
Instrument of TorturenounMWEan instrument of punishment designed and used to inflict torture on the condemned personverifiedMay 18, 2026
Instrument PanelnounMWEelectrical device consisting of a flat insulated surface that contains switches and dials and meters for controlling other electrical devicesverifiedMay 18, 2026
Instrumental ConditioningnounMWEoperant conditioning that pairs a response with a reinforcement in discrete trialsverifiedMay 18, 2026
Instrumental MusicnounMWEmusic intended to be performed by a musical instrument or group of instrumentsverifiedMay 18, 2026
Instrumental RolenounMWEthe semantic role of the entity (usually inanimate) that the agent uses to perform an action or start a processverifiedMay 18, 2026
Instrumentalismnouna system of pragmatic philosophy that considers idea to be instruments that should guide our actions and their value is measured by their successverifiedMay 18, 2026
Instrumentalistnounsomeone who plays a musical instrument (as a profession)verifiedMay 18, 2026