Yes, We Know What It Means

dead (dd)
adj. dead·er, dead·est
1. Having lost life; no longer alive.
2. Marked for certain death; doomed: was marked as a dead man by the assassin.
3.
a. Having the physical appearance of death: a dead pallor.
b. Lacking feeling or sensitivity; numb or unresponsive: Passersby were dead to our pleas for help.
c. Weary and worn-out; exhausted.
4.
a. Not having the capacity to live; inanimate or inert.
b. Not having the capacity to produce or sustain life; barren: dead soil.
5.
a. No longer in existence, use, or operation.
b. No longer having significance or relevance.
c. Physically inactive; dormant: a dead volcano.
6.
a. Not commercially productive; idle: dead capital.
b. Not circulating or running; stagnant: dead water; dead air.
7.
a. Devoid of human or vehicular activity; quiet: a dead town.
b. Lacking all animation, excitement, or activity; dull: The party being dead, we left early.
8. Having no resonance. Used of sounds: "One characteristic of compact discs we all can hear is dead sound. It may be pure but it has no life" (Musical Heritage Review).
9. Having grown cold; having been extinguished: dead coals; a dead flame.
10. Lacking elasticity or bounce: That tennis ball is dead.
11. Out of operation because of a fault or breakdown: The motor is dead.
12.
a. Sudden; abrupt: a dead stop.
b. Complete; utter: dead silence.
c. Exact; unerring. the dead center of a target.
13. Sports Out of play. Used of a ball.
14.
a. Lacking connection to a source of electric current.
b. Drained of electric charge; discharged: a dead battery.
n.
1. One who has died: respect for the dead.
2. The period exhibiting the greatest degree of intensity: the dead of winter; the dead of night.
adv.
1. Absolutely; altogether: You can be dead sure of my innocence.
2. Directly; exactly: There's a gas station dead ahead.
3. Suddenly: She stopped dead on the stairway.