be dead set against (someone or something)

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be dead set against (someone or something)

To be completely opposed to someone or something. Most of the department is dead set against one of our peers becoming our boss, even temporarily. Many people in our small town are dead set against that big construction project, and I think you'll have a hard time changing their minds.
See also: dead, set
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

be dead set against something

If you are dead set against something, you are completely opposed to it. Her father was dead set against her marrying my father. I for one am dead set against charges for eye tests.
See also: dead, set, something
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
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