/ ˈpɔɪzənɪŋ; NAmE / noun [ U , C ]
1.
the fact or state of having swallowed or absorbed poison :
a series of deaths caused by carbon monoxide poisoning
At least 10 000 children are involved in accidental poisonings every year.
2.
the act of killing or harming sb/sth by giving them poison :
The police suspected poisoning.
The rats were controlled by poisoning.
—see also blood poisoning , food poisoning