1. [ [Undefined_variable] ] pronoun, first person singular
2. [ noun ] (chemistry) 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)
Synonyms: iodine atomic_number_53 iodin
Related terms: chemical_element halogen iodine-131 iodine-125 seawater iodize
3. [ noun ] the 9th letter of the Roman alphabet
Related terms: letter Roman_alphabet
4. [ adjective ] used of a single unit or thing; not two or more
Synonyms: one 1 ane

"`ane' is Scottish"

Related terms: cardinal
5. [ noun ] (mathematics) the smallest whole number or a numeral representing this number
Synonyms: one 1 ace unity single

"he has the one but will need a two and three to go with it" "they had lunch at one"

Related terms: digit singleton monad
Similar spelling:   iw