What does fossil mean?
A fossil is the preserved remains, impression, or trace of an organism that lived in the distant past, typically embedded in rock and formed when bones, shells, or other hard parts were gradually replaced by minerals or left an imprint in sediment. The word most often evokes dinosaur skeletons and ammonite shells, but fossils also include footprints, burrows, leaf impressions, and even microscopic organisms, together forming the fossil record that underpins our understanding of life's history on Earth. Beyond science, 'fossil' has acquired an informal figurative sense describing a person, attitude, or custom that seems hopelessly outdated — as in calling a colleague 'an old fossil.' The term is also central to modern discourse through 'fossil fuels,' the coal, oil, and natural gas derived from ancient organic matter whose burning drives climate change, making this small word both a scientific cornerstone and a cultural flashpoint.
nounThe remains or impression of a prehistoric organism preserved in rock, or, informally, an old-fashioned or outdated person, idea, or practice.
- The preserved remains, impression, or trace of a prehistoric organism embedded in rock.
- Informally, a person, idea, or institution that is extremely old-fashioned or resistant to change.
"The museum's newest exhibit is a fossil of a marine reptile over 150 million years old."
"Paleontologists unearthed a remarkably complete fossil of a feathered dinosaur in the Gobi Desert."
"My uncle calls himself a fossil because he still refuses to use a smartphone."
Standard pluralization applies. In geological literature, 'the fossil record' treats fossils collectively.
"The cliffs are rich in fossils dating back to the Jurassic period."
The word 'fossil' originally meant anything dug up from the ground — including gemstones — and only narrowed to ancient life in the 18th century.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of fossil
The word fossil derives from the Latin 'fossilis', meaning 'obtained by digging', itself from 'fodere', 'to dig'. In the sixteenth and seventeenth centuries it applied broadly to any object excavated from the earth, including minerals and gems, before geologists in the eighteenth century restricted it to the remains of once-living organisms. Cognate derivatives such as 'fossilize' and 'fossiliferous' share the same Latin root.
Related word forms
How fossil is actually used
In scientific contexts (paleontology, geology), 'fossil' carries its precise technical meaning of preserved organic remains; in everyday speech it is frequently used jocularly or pejoratively for people deemed out of touch. The figurative use is informal and mildly derogatory, though often affectionate.
Easily confused with fossil
An artifact is an object made by humans, whereas a fossil is the naturally preserved remains of a once-living organism.