(idiomatic) An absolute or total loss.

(object-oriented programming, humorous) The diamond problem.

(nautical) A wind directly ahead, or opposed to the ship's course.

The moment of death.

Alternative form of dead on

(architecture) A blank wall unbroken by windows or other openings.

(nautical) The transverse upward curvature of a vessel's floor.

(nautical) An elliptical line drawn on the sheer plan to determine the sweep of the floorheads throughout the ship's length.

(engineering) A solid covering over a part of a fire grate, to prevent the entrance of air through that part.

To consume alcohol in large enough quantities to induce liver disease or other fatal reactions.