What does dirt mean?
Dirt refers to matter that makes something unclean — mud, dust, grime, or excrement — and by extension to loose earth or soil itself. It is an uncountable noun used constantly in everyday speech: we wash dirt off our hands, dig dirt in the garden, or complain about dirt on the carpet. The word carries strongly negative connotations of mess and impurity, so speakers often prefer neutral terms like 'soil' or 'earth' when describing ground without judgement. Figuratively, dirt extends into human affairs: 'dirty' behaviour is dishonest or unfair, and 'dirt' on someone means scandalous information about them, as in digging up dirt on a rival. Fixed idioms reinforce this flavour — 'dirt cheap' means extremely inexpensive, 'eat dirt' means to submit to humiliation, and treating someone 'like dirt' means showing them utter contempt. The adjective form 'dirty' is among the most common words in the language, making dirt a small word with outsized expressive range.
Unclean matter, such as mud, dust, or filth, that makes something dirty.
"She scrubbed the dirt out of the carpet with a stiff brush."
Always uncountable in this sense.
Loose soil or earth, especially as dug or moved.
"They hauled away truckloads of dirt during the excavation."
Neutral in American English; British English typically prefers 'soil' or 'earth'.
Informal: damaging, private, or scandalous information about a person.
"Rumour has it she has some dirt on her former business partner."
Slang (dated): a contemptible person.
"He called his betrayer a piece of dirt."
Usually preceded by an intensifier such as 'piece of'. Now dated or colloquial.
In British English, 'dirt' originally meant just plain soil — it was American English that turned it into something shameful.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of dirt
The word dirt comes from Middle English 'drit', attested from around the thirteenth century, meaning excrement or filth. It probably derives from Old Norse 'drit', meaning excrement, which would make it one of many everyday English words borrowed during the Viking-age settlement of northern England. Over time the sense broadened and softened from bodily waste to any foul matter and eventually to ordinary soil, particularly in American usage. It is distantly related to other Germanic words for filth, though it has no Latin or Greek cognates.
Related word forms
How dirt is actually used
Dirt is an uncountable noun in its literal senses. In American English, 'dirt' can neutrally mean soil ('a pile of dirt'), while in British English 'soil' or 'earth' is preferred for that neutral sense and 'dirt' leans negative. The figurative sense relating to gossip is informal but very common.
Easily confused with dirt
Earth is the neutral term for soil or ground itself, while dirt usually carries a negative connotation of something unclean or unwanted.
Soil is the technical and neutral term for the upper layer of earth in which plants grow, whereas dirt implies mess or contamination.