What does turbidity mean?
Turbidity denotes the degree to which a liquid is cloudy or opaque because tiny particles are suspended in it. In environmental and water-quality contexts, turbidity is measured to indicate how much light is scattered by materials such as silt, clay, algae, and microorganisms. High turbidity can reduce visibility beneath the surface and may signal that the water needs treatment or investigation, although cloudiness alone does not establish that water is unsafe. The word also has a formal figurative use for language, ideas, or situations that are confused, unclear, or difficult to interpret. Its specialized vocabulary makes it especially useful in discussions of rivers, reservoirs, drinking water, and aquatic ecosystems. Compared with general words such as cloudiness or muddiness, turbidity is more precise and is strongly associated with measurable changes in the appearance or optical properties of a liquid.
nounTurbidity is the cloudiness or lack of transparency in a liquid caused by suspended particles. Figuratively, it refers to a lack of clarity or order in language, thought, or circumstances.
- The cloudiness or opacity of a liquid resulting from suspended particles, especially in water.
- A lack of clarity, order, or intelligibility in language, thought, or circumstances.
"Heavy rainfall increased the turbidity of the river, making it difficult to see beneath the surface."
"The laboratory measured the turbidity of each sample before testing it for bacterial contamination."
"The report attempted to clarify the political turbidity that had obscured the committee's decisions."
This plural is grammatically possible but uncommon; turbidity is normally used as a noun without a plural form.
"The researchers compared the turbidities of samples collected at different depths."
Turbidity is the water world's fog meter: suspended particles scatter light and turn clear water into a cloudy veil.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does turbidity come from?
Turbidity comes through French from Latin turbiditas, a noun formed from turbidus, meaning “muddy,” “thick,” or “confused.” The wider family includes turbid, turbulence, and turbulent, all associated with Latin roots connected with turba, meaning a crowd or tumult. The English word originally developed in a literal sense before acquiring its figurative use for lack of clarity.
How turbidity is actually used
Turbidity is formal and especially common in environmental science, water quality, medicine, and other technical contexts. Its figurative use is uncommon but established, usually suggesting confusion or disorder rather than simple difficulty of expression.
Easily confused with turbidity
Turbidity means cloudiness or opacity, whereas turbulence means disorderly movement, instability, or agitation.
Turbid is the adjective meaning cloudy, muddy, or unclear, while turbidity is the noun naming the quality of being turbid.