<p><strong>Verb:</strong></p><ul><li>(used with object) to take or gather (something usable) from discarded material</li><li>to cleanse of filth, as a street</li><li>to expel burnt gases from (the cylinder of an internal-combustion engine)</li><li>(Metallurgy) to purify (molten metal) by introducing a substance that will combine chemically with impurities</li><li>(used without object) to act as a scavenger</li><li>(of an engine or cylinder) to become scavenged of burnt gases</li><li>to search, especially for food</li></ul>