'Slain' definitions:

Definition of 'slain'

From: WordNet
adjective
Killed; `slain' is formal or literary as in "slain warriors"; "a picture of St. George and the slain dragon"
noun
People who have been slain (as in battle)

Definition of 'Slain'

From: GCIDE
  • 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. [1913 Webster]
  • With this sword then will I slay you both. --Chaucer. [1913 Webster]
  • I will slay the last of them with the sword. --Amos ix. 1. [1913 Webster]
  • I'll slay more gazers than the basilisk. --Shak. [1913 Webster]
  • Syn: To kill; murder; slaughter; butcher. [1913 Webster]