Definition of treasury bill noun from the Oxford Advanced Learner's Dictionary

 

treasury bill

 noun
noun
BrE
 
; NAmE
 
(informal T-bill)
 
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a type of investment sold by the US government in which a fixed amount of money is paid back on a certain date Culture Treasury bills are sold by the US Department of the Treasury to raise money for the government. They are bought for less money than their value, kept for a fixed time, and then sold back to the government for their full value. No interest is paid.
See the Oxford Advanced American Dictionary entry: treasury bill