What does substance mean?
A substance is a particular kind of material or matter, such as a chemical, mineral, or substance with distinctive physical properties. The word can also describe the essential meaning, nature, or significance of a person, argument, or work. For example, a speech may have substance when its ideas are meaningful and supported by relevant detail, whereas a report may be criticized for being more style than substance. In legal and academic contexts, the phrase “the substance of the claim” refers to what is actually alleged or argued. The word is countable and uncountable, and its figurative uses often suggest that something has genuine importance or intellectual depth rather than merely appearing impressive. Its Latin ancestry reflects the idea of an underlying foundation or reality that supports what is visible.
A material or matter of a particular kind, especially one considered in relation to its composition or properties.
"The substance has a strong smell and changes color when exposed to heat."
Often used with words describing a class or type of material, such as “chemical,” “solid,” “toxic,” or “foreign.”
The essential meaning, nature, or quality of something.
"The substance of the lecture was difficult to absorb because it covered several complex topics."
This figurative use is especially common in discussions of writing, speeches, arguments, and reports.
The importance, significance, or lasting reality of a matter.
"Although the dispute looked minor at first, it had real substance because it affected several families."
Common in formal and legal contexts, as in “the substance of the case.”
A solid, coherent, or substantial quality in writing, speech, or conduct.
"Her remarks were brief, but they carried substance and deserved close attention."
Often contrasts intellectual or practical content with superficial style or appearance.
The noun is both countable and uncountable. Use “substances” for separate types or quantities of material, and “substance” for the general idea of matter or for the essential quality of something.
"The laboratory identified several unknown substances in the sample."
From Latin, substance literally meant “that which is underneath”: the foundation supporting a visible appearance.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of substance
The English word entered through Old French from Latin substantia, a noun formed from the underlying Latin word for “to stand under.” It originally referred to something present beneath or supporting something else, and by extension to the essential nature or reality of a thing. The related forms substantial, substantive, substantiate, and substantiation developed from the same Latin root and preserve the idea of underlying reality, importance, or support.
Related word forms
How substance is actually used
The noun is commonly used both countably and uncountably. In formal contexts, it can refer to the essential content or importance of something, as in “the substance of the argument.” In figurative senses, “substance” often contrasts with superficial form or appearance.