Meaning

• To kill, murder.

  "Our foes must all be slain."

• To eradicate or stamp out.

  "You must slay these thoughts."

• (by extension) To defeat, overcome (in a competition or contest).

  "1956, “Giants Slay Bears in Pro Title Battle”, in Lodi News-Sentinel, 1956 December 31, page 8."

• To delight or overwhelm, especially with laughter.

  "Ha ha! You slay me!"

• To amaze, stun or otherwise incapacitate by awesomeness; to be awesome at something; to kill (slang sense).

• To have sex with