be set against something/against doing something

be set against (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: set

be (ˌdead) ˈset against something/against doing something

be strongly opposed to something: I’ve tried to persuade him to move house, but he’s dead set against it. ♢ She’s not very well, but she’s set against going to the doctor.

See also: set, something