A road with no exit. / (by extension, figuratively) A position that offers no hope of progress.

Going nowhere; blocked.

(US) To come to a dead-end.

(idiomatic) a close race or contest in which no winner is apparent

Unremitting heavy weight that does not move. / (nautical) The largest weight of cargo a ship is able to carry; i.e, the weight of a ship when fully loaded minus its weight when empty.

(of a shot in snooker or other cue sports) With just enough weight for a ball to drop into a pocket, or come to rest in a precisely determined position.

Either dead or alive. / Used to indicate someone is being sought for some kind of punishment or reprimand, and that (s)he may be killed in the process of finding, as if this was reasonable punishment.

(idiomatic) Of an issue, moot, passed, irrelevant, forgotten. / (idiomatic) Of a project or plan, wholly dispensed with; never to be completed or revived.

(simile) Undoubtedly and unquestionably dead. / (simile) Very much out of date.

Existing in stasis, without meaningful activity or development.