in no case

in no case idiom
Never, under no circumstances, as in She should in no case be told that he has a terminal illness. [First half of 1400s] For an antonym, see in any case.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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