the elastic, aeriform fluid into which water is converted when heated to the boiling points; water in the state of vapor.-the mist formed by condensed vapor; visible vapor; -- so called in popular usage.-any exhalation.-to emit steam or vapor.-to rise in vapor; to issue, or pass off, as vapor.-to move or travel by the agency of steam.-to generate steam; as, the boiler steams well.-to exhale.-to expose to the action of steam; to apply steam to for softening, dressing, or preparing; as, to steam wood; to steamcloth; to steam food, etc.