/ Dictionary O: Browse Dictionary Meanings and Definitions E. Cobham Brewer, 1894 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z open planopen policyopen-pollinatedopen positionopen primaryopen quoteopen-reel tapeopen registryopen sandwichopen seaopen seasonopen secretopen sentenceopen sesameopen-shelfopen shopopen-sidedopen sightopen spaceopen-stackopen stanceopen stockopen stringopen systemopen-timberedopen traileropen unionopen universeopen universityopen-webopenworkOPer.operaoperableopéra bouffeopera buffaopéra comiqueopera glassesoperagoeropera hatopera houseoperandoperantoperant conditioningopera seriaoperateoperaticoperatingoperating incomeoperating roomoperating systemoperationoperationaloperational amplifieroperational calculusoperationalismoperations incomeoperations researchoperativeoperatoroperatoryopera windowopercleoperculateoperculumopere citato*operettaoperonoperoseOPersOpheliaOpheltesophicleideophidianophidiidophiolatryophioliteophiologyOphirophiteOphiuchusophiuroidophthal.ophthalm-ophthalmiaophthalmia neonatorumophthalmicophthalmitisophthalmo-ophthalmodynamometerophthalmologistophthalmologyophthalmometerophthalmoscopeophthalmoscopyOphüls-opiaopiateopiaticopineopinicusopinionopinionatedopinionativeopinionedopioidopistho-opisthobranchopisthodomosopisthognathousopisthographopiumopiumismopium poppyOpium WarOPMOportoopossumopossum shrimpopotherapyOpp.OppenheimOppenheimeroppidanoppilateopponencyopponentopportuneopportunismopportunisticopportunityopposableopposeopposed-piston engineopposelessoppositeopposite numberopposite promptoppositionoppositionistoppressoppressionoppressiveopprobriousopprobriumoppugnoppugnantOPrOPrussopryOps-opsiaopsin-opsisopsonicopsonifyopsoninopsonize-opsyoptoptativeopticopticaloptical activityoptical artoptical astronomyoptical benchoptical centeroptical character recognitionoptical computeroptical diskoptical double staroptical effectsoptical fiberoptical glassoptical illusionoptical isomeroptical isomerismoptical maseroptical pathoptical printeroptical pumpingoptical rotationoptical scanningoptical soundoptical soundtrackoptical toolingoptical wedgeoptic axisoptic centeroptic chiasmaopticianopticistoptic nerveopticsoptimaloptimeoptimismoptimistoptimisticoptimizationoptimizeoptimumoptimum programmingoptionoptionaloptioneeopto-optoelectronicsoptometeroptometristoptometryoptophoneoptotypeopulenceopulentopusopusculeopusculum-opyoquassaororaorachoracleoracle bonesoracularoracyoradOradeaoraloral contraceptiveoraleoral herpesoral historyoral hygieneoral interpretationoralismoralistorality Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language