Definition of “spent” - English Dictionary

“spent” in American English

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spentadjective [ not gradable ]

us /spent/

completely used to the point of no longer having any power or effectiveness:

Radio signals enabled recovery of the spent rocket 25 miles from the launch site.

Spent also means having no energy left:

After doing her shopping, she was spent.

(Definition of “spent” from the Cambridge Academic Content Dictionary © Cambridge University Press)