poison gas

1. 1.

   a gas that is poisonous to breath or contact; used in chemical warfare

   Broadergaschemical weapon

   Narrowermustard gasnerve gas

Questions about poison gas

What does poison gas mean?

poison gas means "a gas that is poisonous to breath or contact; used in chemical warfare".

Is poison gas a common word?

poison gas is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.