What does flint mean?
Flint is an exceptionally hard, typically grey form of silica-rich stone that fractures with a sharp edge, a property that made it indispensable throughout human history. Because it can be shaped by controlled blows—a technique called knapping—flint served as the raw material for cutting tools, arrowheads, and scrapers across the Stone Age. Its ability to produce hot sparks when struck against iron or steel kept it in everyday service long after metalworking arrived: flints armed the firing mechanisms of flintlock muskets and pistols, and small pieces still start campfires in modern lighters and survival kits. Beyond geology, 'flint' carries figurative weight, describing a person of cold, unyielding character—one said to have 'a heart of flint'. The related adjective 'flinty' likewise evokes hardness, whether of temperament, terrain, or even the mineral taste sometimes attributed to white wines grown in flint-laced soils.
A very hard grey stone consisting mainly of silica, occurring as nodules in chalk and limestone, which fractures with a sharp edge and gives off sparks when struck against steel.
"Neolithic miners dug deep shafts at Grimes Graves to extract high-quality flint."
In archaeological contexts, worked fragments are commonly referred to simply as 'flints'.
A piece of this stone used to strike sparks, especially in a flintlock firearm or lighter.
"He replaced the worn flint in his lighter so it would spark again."
This sense treats 'flint' as a functional component rather than a geological specimen.
Figuratively, a quality of extreme hardness or coldness of feeling, as in 'a heart of flint'.
"Her pleas softened his resolve, though he had seemed a man of flint."
Always figurative; carries a connotation of sternness or lack of compassion.
Standard plural; in archaeology 'flints' frequently refers to worked stone artefacts collectively.
"The ploughed field was littered with ancient flints after the rain."
For hundreds of thousands of years before matches existed, every fire humans lit began with a chip of flint struck against iron pyrites or steel.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of flint
'Flint' descends from Old English 'flint', part of the common Germanic inheritance of English, with cognate forms found in other Germanic languages such as the Scandinavian word 'flinta'. The name has remained remarkably stable across more than a millennium of English use, reflecting how central the material was to daily life. Figurative uses linking flint to hardness of heart developed naturally from the stone's well-known physical properties.
Related word forms
How flint is actually used
Mostly neutral-to-technical register in its literal sense (geology, archaeology, bushcraft); figurative uses carry a connotation of coldness or severity. In archaeology, worked pieces are often called 'flints', and the term is strongly associated with British prehistory (e.g. Norfolk's Grimes Graves mines).
Easily confused with flint
'Flint' is the noun naming the stone itself, while 'flinty' is an adjective describing something hard, unyielding, or stern like flint.