dead set against

Completely against something

Dead set against means completely and unwaveringly opposed to something: She was dead set against selling the house.

The phrase emphasizes firmness of position—someone dead set against something won't be persuaded otherwise.

Dead here intensifies set, which means fixed or determined.

Related

no way · steadfast · resolute · stand firm · repudiation · contrary · unwavering · adamant · firm · implacable · dug in · won't budge · intransigent · uncompromising · unyielding · disapproval · dissent · antagonistic

Opposites
stance/position

dead set againstdead set on

all for · keen on · in favor of · pro · behind

intensity of commitment

dead set againstopen to

persuadable · reluctant

Family

dead, against, death, deadly, deaden, deadness, deadened, deadening, setting

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Negative · Everyday, not technical · Rated G