| poisonous | (adj) having the qualities or effects of a poison, Syn. toxicant |
| poisonous | (adj) not safe to eat |
| poisonous | (adj) marked by deep ill will; deliberately harmful, Syn. vicious, venomous, Example: poisonous hate; venomous criticism; vicious gossip |
| poisonously | (adv) in a very malevolent manner, Syn. venomously |
| poisonous parasol | (n) an agaric regarded as poisonous, Syn. Lepiota morgani |
| poisonous plant | (n) a plant that when touched or ingested in sufficient quantity can be harmful or fatal to an organism |
| Poisonous | a. Having the qualities or effects of poison; venomous; baneful; corrupting; noxious. Shak. -- |