poisonous

word

/ˈpɔɪzənəs/
POY-zuh-nuhs
/pˈɔɪzənəs/
POY-zuh-nuhs

Definition

Something that is poisonous contains poison and can cause harm or death if eaten, touched, or swallowed. It often describes animals, plants, chemicals, or substances that are dangerous to people or animals.

Usage & Nuances

"Poisonous" usually describes something that harms you if you eat or touch it, like snakes, mushrooms, or chemicals. Do not confuse with "venomous" (which refers to animals that inject venom, like snakes or spiders). Common collocations: 'poisonous plant', 'poisonous gas', 'highly poisonous'.

Example Sentences

Some snakes are poisonous and can hurt you.

basic

The liquid in this bottle is poisonous.

basic

Be careful—those berries look pretty, but they’re actually poisonous.

natural

A lot of cleaning products can be poisonous if swallowed.

natural

He spread a poisonous rumor about his coworker at the office.

natural

This mushroom is poisonous. Do not eat it!

basic