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Adjective: 1
  1. Used of a single unit or thing; not two or more
    - one, i, ane [UK, dialect]
Noun: 1
  1. The smallest whole number or a numeral representing this number
    "he has the 1 but will need a two and three to go with it";
    - one, I, ace, single, unity

Derived forms: 1s

See also: cardinal

Type of: digit, figure

Encyclopedia: 1,3-dihydroxyanthraquinone