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Glossary · Nouns · F

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TermTypeDefinitionClassificationsUpdated
Forlorn HopenounMWEa hopeless or desperate enterpriseverifiedMay 18, 2026
Forlornnessnounsadness resulting from being forsaken or abandonedverifiedMay 18, 2026
Form ClassnounMWEone of the traditional categories of words intended to reflect their functions in a grammatical contextverifiedMay 18, 2026
Form DivisionnounMWEan artificial taxonomic category for organisms of which the true relationships are obscureverifiedMay 18, 2026
Form FamilynounMWE(biology) an artificial taxonomic category for organisms of which the true relationships are obscureverifiedMay 18, 2026
Form GenusnounMWEan artificial taxonomic category established on the basis of morphological resemblance for organisms of obscure true relationships especially fossil formsverifiedMay 18, 2026
Form Genus RhizoctinianounMWEform genus of imperfect fungi some species of which are now placed in genera Pellicularia and Corticium because their perfect stages have been foundverifiedMay 18, 2026
Form LetternounMWEa letter that is printed in multiple copies and mailed to a list of recipientsverifiedMay 18, 2026
Form of AddressnounMWEan identifying appellation signifying status or function: e.g. `Mr.' or `General'verifiedMay 18, 2026
Form of GovernmentnounMWEthe members of a social organization who are in powerverifiedMay 18, 2026
Form-Based AuthenticationnounMWEForm-Based Authentication uses forms on a webpage to ask a user to input username and password information.ControlMay 9, 2026
Formal Access ApprovalnounMWEA formalization of the security determination for authorizing access to a specific type of classified or sensitive information, based on specified access requirements, a determination of the individual’s security eligibility and a determination that the individual’s official duties require the individual be provided access to the information.ControlRegulatedCUIMay 9, 2026
formal contractnounMWEAn officially recognized agreement between two or more parties.RequirementConfidentialIPMay 9, 2026
Formal Development MethodologynounMWESoftware development strategy that proves security design specifications.ProcessMay 9, 2026
Formal GardennounMWEa garden laid out on regular lines with plants arranged in symmetrical locations or in geometrical designsverifiedMay 18, 2026
Formal LogicnounMWEany logical system that abstracts the form of statements away from their content in order to establish abstract criteria of consistency and validityverifiedMay 18, 2026
Formal MethodnounMWEMathematical argument which verifies that the system satisfies a mathematically-described security policy.ControlMay 9, 2026
Formal ProofnounMWEComplete and convincing mathematical argument presenting the full logical justification for each proof step and for the truth of a theorem or set of theorems.ArtifactMay 9, 2026
Formal Security PolicynounMWEMathematically-precise statement of a security policy.RequirementMay 9, 2026
Formal SemanticsnounMWEthe branch of semantics that studies the logical aspects of meaningverifiedMay 18, 2026
Formaldehydenouna colorless poisonous gasverifiedMay 18, 2026
Formalinnouna 10% solution of formaldehyde in waterverifiedMay 18, 2026
Formalisationnounthe act of making formal (as by stating formal rules governing classes of expressions)verifiedMay 18, 2026
Formalismnoun(philosophy) the philosophical theory that formal (logical or mathematical) statements have no meaning but that its symbols (regarded as physical entities) exhibit a form that has useful applicationsverifiedMay 18, 2026
Formalitynouna manner that strictly observes all forms and ceremoniesverifiedMay 18, 2026
Formalizationnounthe act of making formal (as by stating formal rules governing classes of expressions)verifiedMay 18, 2026
Formalnessnouna manner that strictly observes all forms and ceremoniesverifiedMay 18, 2026
Formalwearnounattire to wear on formal occasions in the eveningverifiedMay 18, 2026
Formationnounthe act of fabricating something in a particular shapeverifiedMay 18, 2026
Formative CellnounMWEa cell of an embryoverifiedMay 18, 2026
Formatted CapacitynounMWE(computer science) the usable capacity of a disk driveverifiedMay 18, 2026
Formattingnounthe organization of information according to preset specifications (usually for computer processing)verifiedMay 18, 2026
Formatting FunctionnounMWEThe function that transforms the payload, associated data, and nonce into a sequence of complete blocks.CapabilityMay 9, 2026
Formic AcidnounMWEa colorless pungent fuming vesicatory liquid acid HCOOH found naturally in ants and many plants or made catalytically from carbon monoxide and steamverifiedMay 18, 2026
Formicarynouna mound of earth made by ants as they dig their nestverifiedMay 18, 2026
Formicationnounhallucinated sensation that insects or snakes are crawling over the skinverifiedMay 18, 2026
Formidabilitynounimpressive difficultyverifiedMay 18, 2026
Formolnouna 10% solution of formaldehyde in waterverifiedMay 18, 2026
Formulanoun(mathematics) a standard procedure for solving a class of mathematical problemsverifiedMay 18, 2026
Formulationnouninventing or contriving an idea or explanation and formulating it mentallyverifiedMay 18, 2026
Fornicationnounextramarital sex that willfully and maliciously interferes with marriage relationsverifiedMay 18, 2026
Fornicatornounsomeone who commits adultery or fornicationverifiedMay 18, 2026
Fornicatressnouna woman adultererverifiedMay 18, 2026
Fornixnounan arched bundle of white fibers at the base of the brain by which the hippocampus of each hemisphere projects to the contralateral hippocampus and to the thalamus and mamillary bodiesverifiedMay 18, 2026
Forsakingnounthe act of giving something upverifiedMay 18, 2026
Forswearingnounthe act of renouncingverifiedMay 18, 2026
Forsythianounany of various early blooming oleaceous shrubs of the genus ForsythiaverifiedMay 18, 2026
Forte-Pianonouna keyboard instrument that is played by depressing keys that cause hammers to strike tuned strings and produce soundsverifiedMay 18, 2026
Forthcomingnessnounthe state of being imminent and liable to happen soonverifiedMay 18, 2026
Forthrightnessnounthe quality of being honest and straightforward in attitude and speechverifiedMay 18, 2026
Fortificationnounthe addition of an ingredient for the purpose of enrichment (as the addition of alcohol to wine or the addition of vitamins to food)verifiedMay 18, 2026
Fortified WinenounMWEwine to which alcohol (usually grape brandy) has been addedverifiedMay 18, 2026
Fortitudenounstrength of mind that enables one to endure adversity with courageverifiedMay 18, 2026
Fortnightnouna period of fourteen consecutive daysverifiedMay 18, 2026
Fortressnouna fortified defensive structureverifiedMay 18, 2026
Fortuitousnessnounthe quality of happening accidentally and by lucky chanceverifiedMay 18, 2026
Fortuitynounanything that happens suddenly or by chance without an apparent causeverifiedMay 18, 2026
Fortunenounan unknown and unpredictable phenomenon that causes an event to result one way rather than anotherverifiedMay 18, 2026
Fortune CookienounMWEthin folded wafer containing a maxim on a slip of paperverifiedMay 18, 2026
Fortune HunternounMWEa person who seeks wealth through marriageverifiedMay 18, 2026
Fortune TellingnounMWEthe art or gift of prophecy (or the pretense of prophecy) by supernatural meansverifiedMay 18, 2026
Fortunetellernouna person who foretells your personal futureverifiedMay 18, 2026
Forty WinksnounMWEsleeping for a short period of time (usually not in bed)verifiedMay 18, 2026
Forty-Ninernouna miner who took part in the California gold rush in 1849verifiedMay 18, 2026
Forumnouna public meeting or assembly for open discussionverifiedMay 18, 2026
Forward CiphernounMWEOne of the two functions of the block cipher algorithm that is determined by the choice of a cryptographic key. The term “forward cipher operation” is used for TDEA, while the term “forward transformation” is used for DEA.ControlMay 12, 2026
Forward LookupnounMWEForward lookup uses an Internet domain name to find an IP addressProcessMay 12, 2026
Forward MarketnounMWEa commodity exchange where futures contracts are tradedverifiedMay 18, 2026
Forward MotionnounMWEthe act of moving forward (as toward a goal)verifiedMay 18, 2026
Forward PassnounMWEa pass to a receiver downfield from the passerverifiedMay 18, 2026
Forward PassernounMWE(football) a ball carrier who tries to gain ground by throwing a forward passverifiedMay 18, 2026
Forward ProxynounMWEForward Proxies are designed to be the server through which all requests are made.NetworkMay 9, 2026
Forwardingnounthe act of sending on to another destinationverifiedMay 18, 2026
Forwardnessnounoffensive boldness and assertivenessverifiedMay 18, 2026
Forymlnoun(chemistry) the negative univalent acyl radical CHO that occurs in aldehydesverifiedMay 18, 2026
Fossanouna concavity in a surface (especially an anatomical depression)verifiedMay 18, 2026
Fossa CatnounMWElargest carnivore of MadagascarverifiedMay 18, 2026
Fossenounditch dug as a fortification and usually filled with waterverifiedMay 18, 2026
Fossil CopalnounMWEpartly mineralized copal dug from the groundverifiedMay 18, 2026
Fossil FuelnounMWEfuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen contentverifiedMay 18, 2026
Fossil OilnounMWEa dark oil consisting mainly of hydrocarbonsverifiedMay 18, 2026
Fossilisationnounthe process of fossilizing a plant or animal that existed in some earlier ageverifiedMay 18, 2026
Fossilistnouna specialist in paleontologyverifiedMay 18, 2026
Fossilizationnounthe process of fossilizing a plant or animal that existed in some earlier ageverifiedMay 18, 2026
Fossilologynounthe earth science that studies fossil organisms and related remainsverifiedMay 18, 2026
Fossorial FootnounMWEfoot adapted for digging as in molesverifiedMay 18, 2026
Fossorial MammalnounMWEa burrowing mammal having limbs adapted for diggingverifiedMay 18, 2026
Foster CarenounMWEsupervised care for delinquent or neglected children usually in an institution or substitute homeverifiedMay 18, 2026
Foster FamilynounMWEthe family of a fosterlingverifiedMay 18, 2026
Foster HomenounMWEa household in which an orphaned or delinquent child is placed (usually by a social-service agency)verifiedMay 18, 2026
Foster-Brothernounyour foster brother is a male who is not a son of your parents but who is raised by your parentsverifiedMay 18, 2026
Foster-Childnouna child who is raised by foster parentsverifiedMay 18, 2026
Foster-Daughternounsomeone who is raised as a daughter although not related by birthverifiedMay 18, 2026
Foster-Fathernouna man who is a foster parentverifiedMay 18, 2026
Foster-Mothernouna woman who is a foster parent and raises another's childverifiedMay 18, 2026
Foster-Nursenouna nurse who raises another woman's child as her ownverifiedMay 18, 2026
Foster-Parentnouna person who acts as parent and guardian for a child in place of the child's natural parents but without legally adopting the childverifiedMay 18, 2026
Foster-Sisternounyour foster sister is a female who is not a daughter of your parents but who is raised by your parentsverifiedMay 18, 2026
Foster-Sonnounsomeone who is raised as a son although not related by birthverifiedMay 18, 2026
Fosteragenounhelping someone grow up to be an accepted member of the communityverifiedMay 18, 2026