1

1. 1

   (noun) the smallest whole number or a numeral representing this number; "he has the one but will need a two and three to go with it"; "they had lunch at one"

2. 2

   (adjective) used of a single unit or thing; not two or more; "`ane' is Scottish"

syn. one · I · ace · single · unity · i · ane

WordNet 3.1