Meaning

• To use poison to kill or paralyse (somebody).

  "The assassin poisoned the king."

• To pollute; to cause to become poisonous.

  "That factory is poisoning the river."

• To cause to become much worse.

  "He poisoned the mood in the room with his non-stop criticism."

• To cause (someone) to hate or to have unfair negative opinions.

  "She's poisoned him against all his old friends."

• To inhibit the catalytic activity of.

• To place false information into (a cache) as part of an exploit.

Meaning

• (of a living thing) Killed, paralysed, or harmed by receiving a dose of poison.

• (of food or drink) Containing poison.

• (of a pawn) Such that its capture will lessen the capturing player's chance of winning.