toxic gas
nounUK /ˈtɒksɪk ɡæs/
US /ˈtɑːksɪk ɡæs/
A toxic gas is a gas that is harmful or dangerous to breathe.
The workers wore masks to protect themselves from the toxic gas.
OTHER MEANINGS
2. A gas used as a chemical weapon to harm people.
Soldiers were trained to recognize the smell of toxic gas.
3. Gas released in an accident or leak that can hurt people nearby.
The factory leak sent toxic gas into the neighborhood.
4. A gas produced by burning or chemicals that harms the environment.
Cars and factories can release toxic gas into the air.