1. A nonmetallic element belonging to the halogens;
    Used especially in medicine and photography and in dyes;
    Occurs naturally only in combination in small quantities (as in sea water or rocks) (synset 114665575)
  2. The smallest whole number or a numeral representing this number (synset 113764713)
    "he has the one but will need a two and three to go with it"; "they had lunch at one"
  3. The 9th letter of the Roman alphabet (synset 106845083)
  1. Used of a single unit or thing;
    Not two or more (synset 302193977)
    "`ane' is Scottish"

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