Definitions

1. adjective

having a quality or effect that is poisonous or severely damaging.

“The polluted river had a poisonful impact on the ecosystem.”

2. adjective

highly toxic or poisonous.

“The poisonful gas spread rapidly throughout the city, causing widespread panic.”

3. adjective

containing or characterized by poison.

“The poisonful berries were mistaken for edible ones, leading to several illnesses.”