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English definition of “single”

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single

adjective [not gradable]  /ˈsɪŋ·ɡəl/ us  

single adjective [not gradable] (ONE)

one only: A single customer was left in the shop. A single bed is a bed for one person.

single adjective [not gradable] (SEPARATE)

considered by itself or separate from other things: Taxes are the single most important source of funds for the government.

single adjective [not gradable] (NOT MARRIED)

not married: He’s been single for so long, I don’t think he’ll ever marry.

single

noun [C]  /ˈsɪŋ·ɡəl/ us  

single noun [C] (DOLLAR BILL)

A single is a one-dollar bill. A single is also a room for only one person.

single noun [C] (PERSON WHO IS NOT MARRIED)

a person who is not married: Singles pay more in income tax than married people do.
(Definition of single from the Cambridge Academic Content Dictionary © Cambridge University Press)
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