dead set
1 of 2phrase
: firmly determined
The mayor was dead set against[=strongly opposed to] the plan.
She was dead set on[=completely certain about] going to college.
set against; setting against; sets against
: feeling strongly that one does not want (something) or will not do (something)
Everyone was set against going.
He was dead set against the deal.
Cite this Entry
“Dead set.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dead%20set. Accessed 8 Jul. 2026.
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