'1' definitions:

Definition of '1'

From: WordNet
adjective
Used of a single unit or thing; not two or more; "`ane' is Scottish" [syn: one, 1, i, ane]
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" [syn: one, 1, I, ace, single, unity]