Simple Definition of poisonous
: causing sickness or death by entering or touching the body : containing poison
: capable of putting poison into another animal's body by biting it
: very harmful or unpleasant
Examples of poisonous in a sentence
Chocolate is poisonous to dogs.
This species of spider is extremely poisonous.
First Known Use of poisonous
POISONOUS Defined for Kids
Definition of poisonous for Students
: containing poison : having or causing an effect of poison <poisonous mushrooms>
Seen and Heard
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