Source : Webster's Revised Unabridged Dictionary (1913)

Slay \Slay\, v. t. [imp. {Slew}; p. p. {Slain}; p. pr. & vb. n.
   {Slaying}.] [OE. slan, sl?n, sleen, slee, AS. sle['a]n to
   strike, beat, slay; akin to OFries. sl[=a], D. slaan, OS. &
   OHG. slahan, G. schlagen, Icel. sl[=a], Dan. slaae, Sw. sl?,
   Goth. slahan; perhaps akin to L. lacerare to tear to pieces,
   Gr. ????, E. lacerate. Cf. {Slaughter}, {Sledge} a hammer,
   {Sley}.]
   To put to death with a weapon, or by violence; hence, to
   kill; to put an end to; to destroy.

         With this sword then will I slay you both. --Chaucer.

         I will slay the last of them with the sword. --Amos ix.
                                                  1.

         I'll slay more gazers than the basilisk. --Shak.

   Syn: To kill; murder; slaughter; butcher.

Source : WordNet®

slaying
     n : unlawful premeditated killing of a human being by a human
         being [syn: {murder}, {execution}]