poi ‧ son ‧ ing /ˈpɔɪz ə nɪŋ/ BrE AmE noun [uncountable and countable]
1 . illness caused by swallowing, touching, or breathing in a poisonous substance
alcohol/lead/radiation etc poisoning (=caused by a particular substance)
a case of alcohol poisoning
2 . the act of giving poison to someone:
An autopsy revealed no evidence of poisoning.
⇨ ↑ food poisoning