<p><strong>Noun</strong></p><ul><li>a visible exhalation, such as fog, mist, steam, smoke, or noxious gas, diffused through or suspended in the air.</li><li>a gas at a temperature below its critical temperature.</li><li>a substance converted into a gaseous state for technical or medicinal uses.</li><li>a combination of gaseous particles of a substance and air.</li><li>harmful exhalations formerly supposed to be produced within the body, especially in the stomach.</li><li>mental or physical illness, such as depression or hypochondria, formerly supposed to result from such exhalations, especially in women.</li><li>a feeling of being overwhelmed with strong emotion.</li><li>a strange, senseless, or fantastic notion.</li><li>something insubstantial or transitory.</li></ul><p><strong>Verb</strong></p><ul><li>to cause to rise or pass off in, or as if in, vapor; vaporize.</li><li>Archaic: to affect with the vapors; depress.</li><li>to rise or pass off in the form of vapor.</li><li>to emit vapor or exhalations.</li><li>to talk or act grandiloquently, pompously, or boastfully; bluster.</li></ul>