Etymology: Middle English sengle, from Anglo-French, from Latin singulus one only; akin to Latin sem- one — more at same
Date: 14th century
1 a: not married b: of or relating to celibacy 2: unaccompanied by others :lone, sole<the single survivor of the disaster> 3 a (1): consisting of or having only one part, feature, or portion <single consonants>(2): consisting of one as opposed to or in contrast with many :uniform<a single standard for men and women>(3): consisting of only one in number <holds to a single ideal>b: having but one whorl of petals or ray flowers <a single rose> 4 a: consisting of a separate unique whole :individual<every single citizen>b: of, relating to, or involving only one person 5 a:frank, honest<a single devotion>b: exclusively attentive <an eye single to the truth> 6:unbroken, undivided 7: having no equal or like :singular 8: designed for the use of one person only <a single room><a single bed>