The phrase "giant plume" refers to a large and visible cloud-like structure that often rises or spreads out in the air. It can be seen in various situations, such as volcanic eruptions, explosions, or even certain types of pollution. Full definition
Some of Io's eruptions are violent enough to hurl giant plumes of gas and dust 500 kilometres into space. (newscientist.com)
That's because the higher speed of comets and the high volatility of their constituents would create giant plumes on impact, so more of the iridium would escape into space, compared with impacts by rocky asteroids. (newscientist.com)
Giant plumes of smoke can be seen for miles as crews battle a massive fire at the former Bethlehem Steel site. (news.wbfo.org)