steam

1 steam /ˈstiːm/ noun
1 steam
/ˈstiːm/
noun
Britannica Dictionary definition of STEAM
[noncount]
1 
a  : the hot gas that is created when water is boiled
b  : steam that is created by a machine and kept under pressure to provide power
— often used before another noun
2 
: very small drops of water that form on a surface when warm air that contains a lot of water is cooled down
3 
informal : the strength, force, or energy that allows something or someone to continue, to go faster, etc.

full head of steam

— see 1head

full steam ahead

— see 1full

let/blow off (some) steam

informal
: to calm down and get rid of energy or anger by doing something active

under its own steam

of a ship, boat, etc.
: by using its own power
— often used figuratively
2 steam /ˈstiːm/ verb
steams; steamed; steaming
2 steam
/ˈstiːm/
verb
steams; steamed; steaming
Britannica Dictionary definition of STEAM
1 
[no object] : to produce steam
2 
[+ object] : to cook, heat, or treat (something) with steam
3 
: to cause (something, such as a piece of glass) to become covered with small drops of water
[+ object]
— usually + up
[no object]
4 
always followed by an adverb or preposition [no object]
a  : to move by using power produced by steam
b  : to move forward in a quick and forceful way
— sometimes used figuratively — see also steamed, steaming