What is the meaning of decayed?

verb

• Lose a stored charge, magnetic flux, or current.
  • usage: "the particles disintegrated during the nuclear fission process"
  • synonyms: disintegrate, decay, decompose
• Fall into decay or ruin.
  • usage: "The unoccupied house started to decay"
  • synonyms: decay, crumble, dilapidate
• Undergo decay or decomposition.
  • usage: "The body started to decay and needed to be cremated"
  • synonyms: decay

adjective

• Damaged by decay; hence unsound and useless.
  • usage: "rotten floor boards"; "rotted beams"; "a decayed foundation"
  • synonyms: rotten, rotted