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1. Used of a single unit or thing; not two or more
   - one, i, ane [UK, dialect]

1. The smallest whole number or a numeral representing this number
   - one, I, ace, single, unity

Derived forms: 1s

See also: cardinal

Type of: digit, figure

Encyclopedia: 1,2-Dimethyl-chickenwire 1,2-Dimethoxyethane 1,2-Dioxin 1,2-Dimethylbenzene 1,2-Dimethoxybenzene 1,2-Dichloroethene 1,2-Dichloroethane 1,2-Dichlorotetrafluoroethane 1,2-Dichloroethylene 1,2-Ethanedithiol 1,2-benzenedicarboxylic acid 1,2-alpha-L-fucosidase 1,2-benzoquinone 1,2-benzenediol 1,2-addition 1,2-Propanediol 1,2-Naphthoquinone 1,2-Wittig rearrangement 1,2-Propanedithiol 1,2-Dichlorobenzene 1,2,4-Trioxane 1,2,4-Trimethylbenzene 1,2,4-triazole 1,2,4-butanetriol 1,2,4-Trichlorobenzene 1,2,4-Butanetriol 1,2,3 Soleils 1,2,4-Triazole 1,2,4-Butanetriol trinitrate 1,2,4-trichlorobenzene 1,2-Dibromo-3-chloropropane 1,2-DCE 1,2-Dibromopropane 1,2-Dibromoethane 1,2-Benzoquinone 1,2,4-trioxane 1,2,4-trimethylbenzene 1,2-Benzenediol 1,2, Step 1,2-diacylglycerol 3-glucosyltransferase 1,2-naphthoquinone-4-sulfonate 1,2-naphthoquinone 1,2-propanediol 1,2-propadiene 1,2-ethanedithiol 1,2-epoxyethane 1,2-dipole 1,2-ethanediol 1,2-etandiol 1,2-propanedithiol 1,2 Step 1,25-dihydroxyvitamin D 1,3,2,4-dithiadiphosphetane 2,4-disulfides 1,3,2,4-Dithiadiphosphetane 2,4-disulfides 1,25-dihydroxycholecalciferol 1,2-rearrangement 1,2-propylene glycol 1,25-dihydroxy vitamin D 1,25-Hydroxyvitamin D3 1,2-diphenylhydrazine 1,2-dichloroethane 1,2-dichlorobenzene 1,2-dichloroethylene 1,2-dichloroethene 1,2-dichloro-1,1,2,2-tetrafluoroethane 1,2-dibromo-3-chloropropane 1,2-diaminobenzene 1,2-dibromopropane 1,2-dibromoethane 1,2-dichlorotetrafluoroethane 1,2-dioxetane 1,2-dimethylbenzene 1,2-dipalmitoylphosphatidylcholine 1,2-dioxin 1,2-dimethoxyethane 1,2-dihydroxybenzene 1,2-dihydrovomilenine reductase 1,2-dimethoxybenzene 1,2-dimercaptopropane 1,2,3-trihydroxy-benzene 1,1,1,2,2-Pentafluoroethane 1,1'-bi-2-naphthol 1,1,1,2,3,3,3-heptafluoropropane 1,1,1,2,3,3,3-Heptafluoropropane 1,1'-Bi-2-naphthol 1,000 Years and 1 Day 1,000 Violins 1,039 Smoothed Out Slappy Hours 1,001 Arabian Nights 1,1,1,2-Tetrachloroethane 1,1,1-Trifluoro-2,2-dichloroethane 1,1,1-Trichloroethane 1,1,1-trichloroethane 1,1,1-Trifluoroethane 1,1,1-TCA 1,1,1,2-tetrachloroethane 1,1,1,2-Tetrafluoroethane 1,1,1,5,5,5-Hexafluoroacetylacetone 1,1,1,2-tetrafluoroethane 1,000 Places to See Before You Die 1,000,000,000,000,000 AD 1,000,000,000,000,000 1,000,000,000 AD 1,000,000,000,000 AD 1,000,000,000,000 1, 1 1,000,000 1,000 1,000,000 AD 1,000 Miles Away 1,000 Kisses 1,000 Pies 1,000 Oceans 1,000 Hours 1,000 Airplanes on the Roof 1,000,000 BCE 1,000 Guineas Stakes 1,000 Guineas 1,1,1-trifluoro-2,2-dichloroethane 1,2,3,4,4a,5,6,7,8,8a-Decahydronaphthalene 1,2,3,4 1,2,3,4,5,6-hexahydroxycyclohexane 1,2,3,4,5,6-hexachlorocyclohexane 1,112 and Counting 1,1-dimethylhydrazine 1,1-difluoroethane 1,11, 21, 1211,111221 1,10-phenanthroline 1,2,3,4-Tetrahydronaphthalene 1,2,3-Trihydroxybenzene 1,2,3-Triazole 1,2,3-triazole 1,2,3-propanetriol 1,2,3-Propanetricarboxylic acid 1,2,3,4-tetraphenylnaphthalene 1,2,3,4-Tetraphenylnaphthalene 1,2,3-Propane-tricarboxylic acid 1,2,3,5,6-pentathiacycloheptane 1,1-dichloroethylene 1,1,2-Trichloroethane 1,1,2-TCA 1,1,2-trichloroethane 1,1,2-Trifluoro-2-iodoethene 1,1,2,2-tetrachloroethane 1,1,2,2,2-Pentafluoroethane 1,1,1-trifluoroethane 1,1,2,2-Tetrachloroethane 1,1,2,2,2-pentafluoroethane 1,1-DCE 1,1-binaphthol 1,1-Difluoroethane 1,1-dichloroethene 1,1-dichloroethane 1,1-Dichloroethylene 1,1-Dichloro-2,2-difluoroethylene 1,1-Dibromoethane 1,1-Dichloroethene 1,1-Dichloroethane 1,3,5-Cyclohexadiene 1,4-cyclohexanedione 1,4-cyclohexadiene 1,4-diaminobutane 1,4-didehydrobenzene 1,4-dichlorobenzene 1,4-benzoquinone 1,4-benzenediol 1,4-beta-D-xylan synthase 1,4-butynediol 1,4-butanediol 1,4-lactone 1,4-lactonase 1,4-naphthoquinone 1,4 dimethoxybenzene 1,4 Butanediol 1,4-dihydroxybenzene 1,4-dihydropyridine 1,4-dimethoxybenzene 1,4-dioxin 1,4-dioxane 1,4-Dichlorobenzene 1,4-Diaminobutane 1,4-Dimethoxybenzene 1,4-Dioxane 1,4-Dimethylbenzene 1,4-Butanediol dimethanesulfonate 1,4-Butanediol 1,4-Butynediol 1,4-Cyclohexanedione 1,4-Cyclohexadiene 1,4-alpha-glucan branching enzyme 1,4-addition 1,4-b-D-xylan synthase 1,4-benzenedicarboxylic acid 1,4-benzenecarboxylic acid 1,4-Lactone 1,4-Dioxin 1,4-Naphthoquinone 1,4-a-glucan branching enzyme 1,4-a-glucan 6-a-glucosyltransferase 1,4 dioxane 1, 2, 3, 4 1, 2, 3 1, 2, 3, 4, - Bullenstaat! 1, 2, 3 Hide 1, 2, 3 Go! 1,8-Diazafluoren-9-one 1,8-Diazabicycloundec-7-ene 1,8-cineol 1,8-diazafluoren-9-one 1,8-cineole 1, Rue Sesame 1, Canada Square 1, Rue Sésame 1, rue Sesame 1, Supreme Road 1, 2, Step 1, 2, 3 Soleils 1, 2 Pass It 1, 4 dicholorobenzene 1, 2 Step 1,5-hydride shift 1,5-cyclooctadiene 1,5-pentanediol 1,500 metres 1,500 m 1,5-Diaminopentane 1,5-Cyclooctadiene 1,5-Pentanediol 1,5-anhydro-D-fructose reductase 1,5-anhydro-D-fructose dehydratase 1,729 1,618 1,776 1,8-Cineole 1,8-Cineol 1,6-alpha-D-mannosidase 1,6-Diaminohexane 1,6-alpha-L-fucosidase 1,6-hexanedioic acid 1,6-diaminohexane 1,4-Benzoquinone 1,3-Dimethylpentylamine hydrochloride 1,3-Dimethylpentylamine 1,3-Dipolar addition 1,3-Pentadiene 1,3-Dipolar cycloaddition 1,3-Dibromopropane 1,3-Dehydroadamantane 1,3-Dichloropropene 1,3-Dimethylbenzene 1,3-Dimethyl-2-imidazolidinone 1,3-b-galactosyl-N-acetylhexosamine phosphorylase 1,3-b-D-glucan phosphorylase 1,3-b-glucan synthase 1,3-b glucan synthase 1,3-b-oligoglucan phosphorylase 1,3-Propanediol 1,3-Propanedicarboxylic acid 1,3-Propanedithiol 1,3-b-D-glucan 1,3-alpha-L-fucosidase 1,3,5-cyclohexatriene 1,3,5-Trithiane 1,3,5-triazido-2,4,6-trinitrobenzene 1,3,5-trimethylbenzene 1,3,5-triazine 1,3,5-Triazine 1,3,5-Triazido-2,4,6-trinitrobenzene 1,3,5-Trihydroxybenzene 1,3,5-Trioxane 1,3,5-Trimethylbenzene 1,3-Bisphosphoglycerate 1,3-Biphosphoglycerate 1,3-Butadiene 1,3-Cyclohexadiene 1,3-Butanediol 1,3,5-trithiane 1,3,5-trioxane 1,3,7-trimethylxanthine 1,3-Benzenediol 1,3-BPG 1,3-benzenecarboxylic acid 1,3-β glucan synthase 1,3-β-D-glucan 1,3BPG 1,3 Dimethyl-2-Imidazolidinone 1,3 Butanediol 1,3-hydride shift 1,3-dipole 1,3-pentadiene 1,3-propanediol dehydrogenase 1,3-propanediol 1,4,7-triaazacyclononane 1,4,7-Trithiacyclononane 1,4,7-triazacyclononane 1,4-Benzenediol 1,4,7-trithiacyclononane 1,4,6-Androstatrien-3,17-dione 1,4,5-triphosphate 1,4,6- androstatrien-3,17-dione 1,4,7-Triazacyclononane 1,4,6-androstatrien-3,17-dione 1,3-bisphosphoglycerate 1,3-bisphospho-D-glycerate 1,3-butadiene 1,3-dehydroadamantane 1,3-cyclohexadiene 1,3-beta-D-glucan phosphorylase 1,3-benzenediol 1,3-beta-glucan synthase 1,3-biphosphoglycerate 1,3-beta-oligoglucan phosphorylase 1,3-dioxetane 1,3-dimethypentylamine hydrochloride 1,3-diphosphoglycerate 1,3-dipolar cycloaddition 1,3-dipolar addition 1,3-dichloropropene 1,3-dibromopropane 1,3-dihydroxybenzene 1,3-dimethylpentylamine 1,3-dimethyl-2-imidazolidinone