the world > movement > motion in a certain direction > going or coming out > letting or sending out > let or send out [verb (intransitive)] > be emitted > emit vapour (2)
intransitive. Of a steam-powered vehicle or boat: to emit puffs of smoke; (with adverb or adverbial phrase) to move in a specified direction while…
intransitive. Of vapour, perfume, †heat, etc.: To pass off into the air. Of a liquid, etc.: To pass off as vapour; to evaporate. Const. from, out of.