STEAM

I. noun Etymology: Middle English stem, from Old English stēam; akin to Dutch stoom ~ Date: before 12th century a vapor arising from a heated substance, 2. the invisible vapor into which water is converted when heated to the boiling point, the mist formed by the condensation on cooling of water vapor, 3. water vapor kept under pressure so as to supply energy for heating, cooking, or mechanical work, active force ; power , momentum , pent-up emotional tension , 4. ~er 2a, travel by or a trip in a ~er, II. verb Date: 15th century transitive verb to give out as fumes ; exhale , to apply ~ to, intransitive verb to rise or pass off as vapor, to give off ~ or vapor, 3. to move or travel by the agency of ~, to move or proceed with energy or force, to be angry ; boil