Î
WordNet
adjective
(1) Used of a single unit or thing; not two or more
"`ane' is Scottish"
noun
(2) The 9th letter of the Roman alphabet
(3) 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"
(4) 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)