Noun

• S: (n) iodine, iodin, I, atomic number 53 (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))
• S: (n) one, 1, I, ace, single, unity (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"
• S: (n) I, i (the 9th letter of the Roman alphabet)
• S: (n) United States, United States of America, America, the States, US, U.S., USA, U.S.A. (North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776)

Adjective

• S: (adj) one, 1, i, ane (used of a single unit or thing; not two or more) "`ane' is Scottish"