dead set against (something) - to be determined not to do something The parents are dead set against their son going to Europe for a year. dead tired - to be very tired, to be exhausted I was dead tired so I went to bed when I got home. dead to the world - to be sleeping soundly The little boy was dead to the world when his father took him out of the car. dead wrong - to be totally wrong I was dead wrong in my calculations to build the table. deadbeat - a person who never pays his debts There is a new government policy to.