Definition of Dead

Adjective: dead (deader,deadest) ded

No longer having or seeming to have or expecting to have life
"the nerve is dead"; "a dead pallor"; "he was marked as a dead man by the assassin"
Not showing characteristics of life especially the capacity to sustain life; no longer exerting force or having energy or heat
"Mars is a dead planet"; "dead soil"; "dead coals"; "the fire is dead"
Very tired
"I'm dead after that long trip";
- all in, beat, bushed
Unerringly accurate
"a dead shot"; "took dead aim"
Physically inactive
"Crater Lake is in the crater of a dead volcano of the Cascade Range"
(followed by 'to') not showing human feeling or sensitivity; unresponsive
"passersby were dead to our plea for help";
- numb
Devoid of physical sensation; numb
"his gums were dead from the novocain";
- deadened
Lacking acoustic resonance
"dead sounds characteristic of some compact discs"; "the dead wall surfaces of a recording studio"
Not yielding a return
"dead capital";
- idle
Not circulating or flowing
"dead air"; "dead water";
- stagnant
Not surviving in active use
"Latin is a dead language"
Lacking resilience or bounce
"a dead tennis ball"
Out of use or operation because of a fault or breakdown
"a dead telephone line"; "the motor is dead"
No longer having force or relevance
"a dead issue"
Complete
"came to a dead stop";
- utter
Drained of electric charge; discharged
"a dead battery";
- drained, flat [Brit]
Devoid of activity
"this is a dead town; nothing ever happens here"

Noun: dead ded

People who are no longer living
"they buried the dead"
A time when coldness (or some other quality associated with death) is intense
"the dead of winter"

Adverb: dead ded

Quickly and without warning
"he stopped dead";
- abruptly, suddenly, short
Completely and without qualification; used informally as an intensifier
"you can be dead sure of my innocence"; "was dead tired"; "dead right";
- absolutely, perfectly, utterly