intransitive. Of smoke, a flame, etc.: to rise up; to issue upwards. Cf. main sense 38.

intransitive. Of smoke, mist, etc.: to ascend into the air. Also figurative.

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.

Of vapour, etc.: To be emitted or exhaled; to rise or issue in the form of steam. Also with away, up, etc.

intransitive. Of smoke, a vapour, etc.: To issue, rise, pass off; to rise and pass away.

intransitive. To rise in smoke or vapour. Obsolete.

In physical sense: To flow forth, issue, proceed, from a material source; chiefly of intangible things, as light, gases, effluvia, etc. Also, to…

transitive. To give off or release (gas or vapour); to outgas. Also intransitive: (of a gas or vapour) to be given off or released. Cf. off-gassing…