Meaning of “nothing less than something” in the English Dictionary

American

"nothing less than something" in American English

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nothing less than something

also nothing short of something

only a particular quality in something, and not worse:

The chef will accept nothing less than perfection from his kitchen staff.

Nothing less than something is also used to show something is very important or serious:

The president proposed nothing less than a complete overhaul of the tax system.
Note: Used to emphasize how important or difficult an activity is.

(Definition of “nothing less than something” from the Cambridge Academic Content Dictionary © Cambridge University Press)