That's nice, but since we're using the English language, perhaps we should use agreed-upon definitions of its words, from a main-stream dictionary. From your definition, an unborn would have to be brought back to life at 20 weeks, which is of course impossible.
Which one do you want to use?
http://www.merriam-webster.com/dictionary/dead
Main Entry: 1dead
Pronunciation: \ˈded\
Function: adjective
Etymology: Middle English deed, from Old English dēad; akin to Old Norse dauthr dead, deyja to die, Old High German tōt dead — more at die
Date: before 12th century
1 : deprived of life : no longer alive
2 a (1) : having the appearance of death : deathly <in a dead faint> (2) : lacking power to move, feel, or respond : numb b : very tired c (1) : incapable of being stirred emotionally or intellectually : unresponsive <dead to pity> (2) : grown cold : extinguished <dead coals>
3 a : inanimate, inert <dead matter> b : barren, infertile <dead soil> c : no longer producing or functioning : exhausted <a dead battery>
4 a (1) : lacking power or effect <a dead law> (2) : no longer having interest, relevance, or significance <a dead issue> b : no longer in use : obsolete <a dead language> c : no longer active : extinct <a dead volcano> d : lacking in gaiety or animation <a dead party> e (1) : lacking in commercial activity : quiet (2) : commercially idle or unproductive <dead capital> f : lacking elasticity <a dead tennis ball> g : being out of action or out of use <the phone went dead>; specifically : free from any connection to a source of voltage and free from electric charges h (1) : being out of play <a dead ball> (2) : temporarily forbidden to play or to make a certain play in croquet
5 a : not running or circulating : stagnant <dead water> b : not turning <the dead center of a lathe> c : not imparting motion or power although otherwise functioning <a dead rear axle> d : lacking warmth, vigor, or taste
6 a : absolutely uniform <a dead level> b (1) : unerring (2) : exact <dead center of the target> (3) : certain to be doomed <he's dead if he's late for curfew> (4) : irrevocable <a dead loss> c : abrupt <brought to a dead stop> d (1) : complete, absolute <a dead silence> (2) : all-out <caught it on the dead run>
7 : devoid of former occupants <dead villages>