[Hitchhiker 42]

Originally Posted by Bob Steele

Sorry, that isn't right... Steam is water in its gaseous form.

All vapors are gas, they just happen to be a gas that is below the critical temperature which means they can be condensed by pressure without lowering the temperature. This also means they can coexist with liquid water. (this depends on pressure)

Steam is always a gas.... it could also be a vapor in certain situations but not always.

Water vapor is actually invisible (you can't see it). We don't typically refer to water vapor as steam. Steam is the same as clouds: they are little water droplets condensed in the air. Steam is a liquid dispersed in little drops in the air.