dirt (dûrt)n.1. Earth or soil.2. a. A filthy or soiling substance, such as mud or dust.b. Excrement.3. A squalid or filthy condition.4. One that is mean, contemptible, or vile.5. a. Obscene language or subject matter.b. Malicious or scandalous gossip.c. Information that embarrasses or accuses.6. Unethical behavior or practice; corruption.7. Material, such as gravel or slag, from which metal is extracted in mining.[Middle English, variant of drit, excrement, filth, mud, from Old Norse.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.dirt (d??t) n1. any unclean substance, such as mud, dust, excrement, etc; filth2. loose earth; soil3. (Civil Engineering) a. packed earth, gravel, cinders, etc, used to make a racetrackb. (as modifier): a dirt track. 4. (Mining & Quarrying) mining the gravel or soil from which minerals are extracted5. a person or thing regarded as worthless6. obscene or indecent speech or writing7. slang gossip; scandalous information8. moral corruption9. do someone dirt slang to do something vicious to someone10. dish the dirt informal to reveal secrets or spread malicious gossip about someone11. eat dirt slang to accept insult without complaining12. treat someone like dirt to have no respect or consideration for someone[C13: from Old Norse drit excrement; related to Middle Dutch dr?te]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014dirt (d?rt) n. 1. any foul or filthy substance, as mud, grime, dust, or excrement. 2. earth or soil, esp. when loose. 3. something or someone vile, mean, or worthless. 4. moral filth; vileness; corruption. 5. obscene or lewd language. 6. gossip, esp. of a malicious nature. 7. (in placer mining) the material from which gold is separated by washing. [1250?1300; Middle English dirt, drit